“The Roundup” newsletter is hot off the presses from @AspenJournalism #ColoradoRiver #COriver #aridification

The boat ramp at Elk Creek Marina had to be temporarily closed so the docks could be moved out into deeper water. Colorado water managers are not happy that emergency releases from Blue Mesa Reservoir are impacting late summer lake recreation.
CREDIT: HEATHER SACKETT/ASPEN JOURNALISM

Click here to read the newsletter. Here’s an excerpt:

Colorado water managers unhappy with timing of emergency releases

In an effort to prop up water levels at the declining Lake Powell, federal water managers are negatively impacting recreation on Colorado’s biggest man-made lake.

That’s the message from Colorado water managers and marina operators at Blue Mesa Reservoir in Gunnison County. On Aug. 1, the Bureau of Reclamation, which operates the reservoir, began emergency releases. By the time the releases are finished the first week of October, Blue Mesa is projected to fall to its second-lowest level ever, just 215,000 acre-feet, or 22.8% of its 941,000-acre-foot capacity.

As of Sept. 1, the reservoir was 37% full, which is about 68 feet down from a full reservoir, and a ring of muddy shoreline was growing. Parking lots and boat slips sat empty, and Pappy’s Restaurant was closed for the season. The dwindling water levels are first impacting Iola, the easternmost of Blue Mesa’s three basins. Iola is where the Gunnison River now cuts through a field of mud.

Eric Loken, who operates the reservoir’s two marinas (Elk Creek and Lake Fork), said he was given only nine days’ notice to empty Elk Creek Marina’s 180 slips. The dock system’s anchors, which are not built for low water, had to be moved deeper. He said about 25 people lost their jobs six weeks earlier than normal and the marinas lost about 25% of its revenue for the year.

41st Annual #Colorado Law Conference on Natural Resources Equity in the #ColoradoRiver Basin: How to Sustainably Manage a Shrinking Resource , September 29-October 1, 2021 #COriver #aridification

Horseshoe Bend, Arizona. Photo credit: Getches-Wilkinson Center

Click here for all the inside skinny and to register:

In any given year of late, demands for water in the Colorado River Basin exceed supply. Chronic drought, record heat, and rampant wildfires are already affecting the Basin’s overall health and resilience, and the historically low levels in Lakes Mead and Powell have caused an unprecedented call on the river. These historic challenges come at a time when several key components of the “Law of the River” are sunsetting in 2026. Key players are already revisiting the 2007 Interim Guidelines, Minute 323, and the 2019 Drought Contingency Plan. Relatedly, endangered fish recovery programs relevant to the region expire in 2023. Meanwhile, 48% of Tribal households in the U.S. do not have access to reliable water sources, clean drinking water, or basic sanitation. These harsh realities hasten the need to advance sustainable water management, improve watershed resilience, and ensure clean water access through collaborative decision-making. We look forward to bringing together diverse expertise and perspectives from across the region to draw the roadmap to an equitable future in the Colorado River Basin.

Part 1: Universal Access to Clean Water on Tribal Lands (Thursday morning)
Part 2: Ecosystem Health of the Colorado River Basin (Thursday afternoon)
Part 3: CRB Hydrology & Management Guideline Renegotiations (*Friday)

Opening Reception
Wednesday, September 29
5:30-7:30 p.m.
Wolf Law Building, Schaden Commons

We look forward to reconnecting with friends and colleagues, as well as
celebrating the 25-year career of Dr. Doug Kenney who retired at the end of 2020.

41st Annual Colorado Law Conference on Natural Resources
Thursday, September 30 and Friday, October 1
9:00 a.m.-5:00 p.m.
Wolf Law Building, Wittemyer Courtroom

Conference Program

Conference Registration

#ClimateChange is destabilizing the #ColoradoRiver Basin. Where do we go from here? — Environmental Defense Fund #COriver #aridification

From the Environmental Defense Fund (Christopher Kuzdas):

In June, a portion of my neighborhood in Flagstaff, Arizona, was put on pre-evacuation notice due to a nearby wildfire. A few weeks later, storms dumped heavy rains over a burn scar from a 2019 fire that caused destructive floods through parts of town. So far, this summer has been our third-wettest monsoon season on record, a complete contrast from our two driest monsoon seasons on record in 2019 and 2020.

These extremes are just a few local examples of the havoc that climate change is causing around the world. Here in the West, we are now in uncharted territory with the first-ever shortage declaration on the Colorado River.

What the shortage declaration means

The U.S. Bureau of Reclamation recently confirmed the Colorado River will be operated under never-before-used shortage rules, called a “tier 1” shortage, starting in 2022.

Under the rules defined by the 2019 Drought Contingency Plan (DCP), other agreements and the river’s operating guidelines, Arizona will absorb the brunt of this shortage. About one-third less water will flow through the Central Arizona Project canal to the Phoenix and Tucson areas, primarily impacting farmers. Nevada and Mexico will also see mandatory but smaller water cuts.

Though overused and overallocated, the Colorado River still provides water for 40 million people in the United States, Mexico and 30 Native American tribes. Water use across the Colorado River Basin has been unsustainable for years, and it was set up to be that way, going back to the 1922 Colorado River Compact that divided up the river. But climate change is now magnifying and accelerating problems in the basin. Photo credit: The Environmental Defense Fund

Even more concerning are water supply projections for 2023 and beyond.

Bureau of Reclamation projections forecast Lake Mead could fall close to a threshold where there are no rules outlining additional water cuts to avoid a crash to dead pool — when no water can flow out of Hoover Dam. This risk of an acceleration in plummeting water levels — which also jeopardizes water levels in Lake Powell — has prompted basin state representatives to initiate meetings to discuss additional actions that might be needed if water levels in Lake Mead fall below 1,020 feet.

It will get hotter and drier

This unprecedented situation offers a glimpse into our future. Warming scenarios from the latest IPCC report suggest that we could exceed 2 degrees Celsius of warming around midcentury, with more than 5 degrees by the end of the century, in the absence of action to curb carbon emissions.

Brad Udall: Here’s the latest version of my 4-Panel plot thru Water Year (Oct-Sep) of 2019 of the #coriver big reservoirs, natural flows, precipitation, and temperature. Data goes back or 1906 (or 1935 for reservoirs.) This updates previous work with @GreatLakesPeck

Why does this matter for the Colorado River? Colorado River flows are highly sensitive to warming, and aridification caused by climate change is already reducing the water flowing in the river. With each additional 1 degree Celsius (1.8 degrees Fahrenheit) of warming, the Colorado River’s average flow drops by 9.3%, according to the U.S. Geological Survey. Colorado River flows could be up to one-third less than the current average within a generation, unless meaningful and immediate reductions in carbon emissions are achieved.

The outlook for the Colorado River is overwhelming. But what our future looks like is still our choice. We can, and should, choose to pursue a just transition to a basin with significantly less water. While in no way comprehensive, below are four ways to get started on that path.

1. Reconcile water demand with our climate reality.

Reconciling demands with our climate reality, at the very least, will involve updating river operating rules, scaling up conservation programs and shifting away from outdated expansionism.

The rules that determine how we balance supply and demand, and the underlying rights and agreements that collectively determine who gets how much water and when, will play a major role in how we transition to a basin with less water.

River operating rules have become more flexible to some extent as they evolved through new agreements like the DCP. However, current river operating rules still don’t account for the full suite of climate change impacts, especially those impacts under more dire climate scenarios. While river operating rules are already a focus of discussion, updating them will require thoughtful leadership, as well as attention to climate and other social and environmental considerations.

Scaling up conservation programs such as system conservation in the Lower Basin and demand management in the Upper Basin will also play an important role. If not for water conserved in Lake Mead, a “tier 1” shortage would have occurred years ago. Our challenge moving forward will be expanding the scale and impact of these programs, and in the Upper Basin, moving much faster to do so.

To fully reconcile demands with our climate reality, we must also finally shift away from legacy expansionism and boosterism that still show up through unnecessary project proposals like the Lake Powell Pipeline. We can do more with less.

Lake Mead water levels have dropped to a record low. Overall water use must also go down, and it must go down significantly to meet our climate reality. Photo: Chris Richards/Flickr (CC BY-NC-ND 2.0) via Audubon

2. Address long-standing inequities.

Long-standing inequities should be addressed to ensure water security for all. Two of the many considerations are inclusive decision-making and fully recognizing tribal water rights.

Inclusive and transparent processes to make decisions are essential to developing solutions that account for multiple values and goals. In the past, decision-making was often exclusive and responded primarily to a narrow set of private interests. That is changing.

From the 2018 Tribal Water Study, this graphic shows the location of the 29 federally-recognized tribes in the Colorado River Basin. Map credit: USBR

For example, Arizona’s DCP process included some tribes and conservation groups, and the process would not have been successful without the leadership of the Gila River Indian Community and the Colorado River Indian Tribes. More diversity at the table enables more creativity and better solutions.

Although the Colorado River Basin’s 30 sovereign Native American tribes have unique rights and claims to a significant portion of the Colorado River’s flow, not all are using their water for several reasons. Those reasons include aging or inadequate infrastructure; limited funding; and significant legal, policy and administrative barriers.

Overcoming such barriers to accessing Colorado River water and confirming and fulfilling tribal water rights will be critical for many tribes to achieve goals such as meeting basic water needs and securing livelihoods. Addressing those barriers is a step toward dealing with long-standing inequity and should be a priority for policymakers.

3. Take a whole-portfolio approach.

A whole-portfolio approach includes new watershed-focused actions to support communities in adapting to and mitigating the steadily compounding risks and extremes of climate change. The recently published Ten Strategies for Climate Resilience report describes a suite of local and watershed-scale projects to do just that, including forest health and restoration, naturally distributed storage, regenerative agriculture and new crop markets.

A whole-portfolio approach also necessitates adequate management and planning for our other water supplies. However, that’s not fully possible across a large part of the basin without changes in state-level water law and policy. For example, Arizona, which makes up almost half the landmass of the Colorado River Basin, already depends on groundwater for 40% of its annual water supply and will only become increasingly dependent on groundwater as Colorado River flows shrink. Arizona does not manage groundwater across most of the state, and local rural communities have little to no power to do so.

Changing this free-for-all approach to groundwater in rural Arizona is critical if we hope to have a water-secure future for all people in the basin.

4. Lead on climate.

More warming means less water in the Colorado River Basin. How much water dries up depends on how fast we can get off fossil fuels. Across the basin, and globally, freshwater agendas must start including actions to stop heating the planet. Climate leadership is water leadership.

The road ahead is difficult. But what our shared future looks like in the Colorado River Basin is our own choice. Let’s choose to collectively pursue a just transition to a basin with less water.

#ColoradoRiver Working Group Kickoff Meeting Set for September 7, 2021 in Rock Springs — #Wyoming Governor Gordon #GreenRiver #COriver #aridification

Panorama of downtown Rock Springs, looking southeast from grant Street. By Vasiliymeshko – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=108016208

Here’s the release from Governor Gordon’s office:

Governor Mark Gordon’s Colorado River Working Group will hold its first meeting from 9 am to noon on Sept. 7 in Rock Springs. The group will discuss important Colorado River matters and monitor potential impacts to Wyoming. The kickoff meeting will be open to the public and led by the Wyoming State Engineer’s Office.

The formation of the Working Group comes in response to continuing drought conditions in the Colorado, Green and Little Snake River basins and associated issues concerning Colorado River Basin management. The Governor’s charge to the Working Group is to discuss and share Colorado River information with interested stakeholders in the Green and Little Snake River Basins. It is a continuation of a coordinated and proactive outreach effort that has been underway in Wyoming since 2019.

This group is made up of representatives of key water use sectors in the Green and Little Snake River Basins. Working Group members are:

Municipal interests

  • Ben Bracken — Green River/Rock Springs/Sweetwater Joint Powers Board (retired)
  • Brad Brooks — Cheyenne Board of Public Utilities
  • Agriculture interests

  • Chad Espenscheid
  • Legislative interests

  • Senator Larry Hicks — Senate District 11
  • Representative Albert Sommers — House District 20
  • Environmental interests

  • Jen Lamb — The Nature Conservancy
  • Industrial interests

  • Aaron Reichel — Genesis-Alkali
  • Ron Wild — PacifiCorp
  • The September 7th meeting will be held at Western Wyoming Community College in Business Office Room #3650 A&B in Rock Springs. More information, including background materials and future meeting agendas, will be posted on the Colorado River Working Group web page on the Wyoming State Engineer’s website: https://seo.wyo.gov/interstate-streams/wyoming-colorado-river-working-group.

    Electric costs in #Colorado set to surge as #LakePowell struggles to produce hydropower — @WaterEdCO #ColoradoRiver #COriver #aridification

    Lake Powell’s Glen Canyon Dam is used to produce hydropower that is delivered over a 17,000-mile transmission grid, reaching six states and 5 million people. Photo courtesy Western Area Power Administration.

    From Water Education Colorado (Jerd Smith):

    The federal agency that distributes electricity from hydropower plants in the Upper Colorado River Basin will ask its customers, including more than 50 here in Colorado, to help offset rising costs linked to Lake Powell’s inability to produce as much power due to drought.

    The Western Area Power Administration (WAPA), which distributes Lake Powell’s electricity, is gathering public comments and asking its customers how best to cope with long-term drought conditions that have pushed Powell and other reservoirs to historically low levels.

    As flows in the Colorado River have declined due to climate change and a 20-year megadrought, there is less water in its storage reservoirs and, therefore, less pressure to power the turbines, causing them to generate less electricity.

    WAPA has had to nearly double the amount of extra power it has had to buy this year to ensure it can meet its contract obligations to its customers.

    “It’s all bad news, but it isn’t necessarily unexpected,” said WAPA spokesperson Lisa Meiman.

    WAPA power is among the most sought-after in Western states because it is sold at cost and because it is a renewable power resource, something highly valued in places such as Colorado, where utilities are working to reduce their reliance on fossil fuels.

    WAPA often buys extra power if for some reason its customers’ electricity needs don’t match up with its hydropower production on a given day. It delivers power over a 17,000-mile transmission grid to six states and 5 million people.

    But as flows in the Colorado River have shrunk, those purchases have become larger and more frequent.

    Last year it bought an extra 413,000 megawatts of power. This year it has already purchased 833,000 megawatts of additional power, according to Meiman, and the agency expects that number to grow this year and likely again next year as the drought continues with no relief in sight.

    These turbines at Lake Powell’s Glen Canyon Dam are at risk of becoming inoperable should levels at Powell fall below what’s known as minimum power pool due to declining flows in the Colorado River. Photo courtesy U.S. Bureau of Reclamation.

    This year, because of the power demands of the West’s growing population and the need for air conditioning to combat ultra-high temperatures, power costs are already soaring.

    Last year WAPA paid $25 per megawatt for its replacement power, Meiman said. This year it is paying $33 per megawatt, a 30% jump.

    In Colorado, WAPA sells power to some of the state’s largest electric utilities, such as Tri-State Generation and Transmission, as well as cities, small towns and rural electric co-ops.

    “We’re watching the situation closely,” said Natalie Eckhart, a spokesperson for Colorado Springs Utilities, which is a WAPA electric customer and which also draws a significant portion of its water from the Colorado River system.

    “The bottom line is we care about this on all fronts,” Eckhart said.

    Few expected power generation at Lake Powell to decline so quickly. The Colorado River Basin serves seven U.S. states and 30 Native American Tribes. For months, the U.S. Bureau of Reclamation and the Upper Colorado River Basin states of Colorado, New Mexico, Utah and Wyoming have been nervously watching what’s known as the minimum power pool level at Powell, the lowest elevation at which power can be produced, which is 3,490 feet. If the reservoir drops lower than that, all hydropower production will stop.

    In July, as water levels at Powell continued to plummet, the U.S. Bureau of Reclamation, as part of the Upper Basin’s Drought Contingency Plan, began emergency releases of water from Utah’s Flaming Gorge, Colorado’s Blue Mesa, and New Mexico’s Navajo reservoirs to boost levels and protect Powell’s hydropower production.

    And while those releases are expected to help keep the turbines functioning, the releases won’t be enough to restore them to full production, leaving WAPA little choice but to look at restructuring the way it sells power and to raise its prices.

    WAPA is forecasting a 35% increase in its costs, but is working to minimize the impact on utilities that purchase its power and anticipates a 12% to 14% rate increase as early as December. Some utilities are preparing to buy power elsewhere, when possible, to reduce their costs.

    Holy Cross Energy, a rural electric co-op based in Glenwood Springs that is also a WAPA customer, has spent years converting its power portfolio from fossil fuels to renewable energy sources including wind, solar and biomass, as well as hydropower.

    While WAPA electricity comprises just 3% of its power portfolio, Holy Cross CEO Bryan Hannegan is worried that this renewable, low-cost power source is in jeopardy if flows from the Colorado River into Lake Powell continue to decline, as they are projected to do.

    “It’s one of the cleanest and lowest-cost sources of power for a whole range of utilities,” Hannegan said. “It’s been a bedrock on which we built the West. For it not to be available … it’s a big deal.”

    Jerd Smith is editor of Fresh Water News. She can be reached at 720-398-6474, via email at jerd@wateredco.org or @jerd_smith.

    #ColoradoRiver Forecasts Not a ‘Crystal Ball’: Computer models inform key decisions in the Colorado River basin. But they cannot predict the future — Circle of Blue #COriver #aridification

    This map shows the snowpack depth of the Maroon Bells in spring 2019. The map was created with information from NASA’s Airborne Snow Observatory, which will help water managers make more accurate streamflow predictions. Jeffrey Deems/ASO, National Snow and Ice Data Center

    From Circle of Blue (Brett Walton):

    Every month the Bureau of Reclamation attempts to peer two years into the future of the Colorado River and its reservoirs.

    Reclamation’s 24-month study is a staple forecasting product for the federal agency that manages a chain of dams in the watershed, including those that control lakes Mead and Powell, the country’s largest reservoirs — and currently two of its most consequential. The reservoirs are a key source of drinking water for about 40 million people, plus they store water that irrigates millions of acres of farmland and generates electricity for the Southwest. The reservoirs are also alarmingly dehydrated right now — about one-third full, the lowest since they were first filled. The entire basin is on alert.

    The 24-month study, in the simplest terms, projects water levels for the next two years at 12 federal reservoirs in the Colorado River basin. Produced monthly, it’s one of several forecasting products that give water managers a sense of possible futures. It is also the foundation of essential water management decisions in the basin. Reclamation’s other forecasts, updated less frequently, look at mid-term (five years out) and long-term (multiple decades) scenarios.

    Typically nested in wonkish obscurity, the 24-month study acquired newfound public prominence in recent weeks. The August results are the most important of all the months because they determine how much water will be released in the following year from Mead and Powell. Because Mead is so low, the August results triggered the first-ever Tier 1 shortage on the lower Colorado River, a declaration that means mandatory cuts in water deliveries in 2022 to Arizona, Nevada, and Mexico. Because Powell is so low, dam managers will release a comparative trickle of water next year, so little that Mead is likely to plunge even lower.

    More eyes than usual on a technical product that was designed to guide reservoir operations means more potential for misinterpretation, especially by people unfamiliar with the study and its assumptions. Carly Jerla, Reclamation’s senior water resources program manager, said that the study has its defined uses but also its limits.

    “It’s important to understand that we’re not saying that this is what we think is going to happen this year,” Jerla told Circle of Blue about the reservoir levels outlined in the 24-month study. “We’re not saying, ‘Plan for this and only this because we have crystal ball knowledge of what is going to happen.’”

    Reclamation’s models, in fact, are not a crystal ball. Critics say that they are not pessimistic enough about the potential for extremely dry years. But as the Colorado River basin dries due to a warming planet, Jerla and others are actively considering how best to convey to the public and water managers alike the looming risks to water supplies and to prepare people, at least mentally, for the possibility that reality could turn out much worse than the forecast had projected…

    Accurate mid-term weather forecasts, those that extend out a couple weeks and up to a year, are notoriously difficult to achieve, said Jeff Lukas, an independent climate researcher in Colorado who has worked in the basin for 20 years. It’s especially true in the mountainous terrain of Colorado and Wyoming, where the Colorado River and its main tributaries have their headwaters. Well-known seasonal patterns like the cyclical warming of the eastern Pacific during El Nino years can indicate wetter or drier, but without substantial precision.

    Because the future is hazy, the models instead rely on the recent past as a guide, Lukas said. “We’re basically saying in the absence of real prognostic information, we’ll substitute history.”

    Here’s how that works. The 24-month study process begins with the Colorado Basin River Forecast Center, a team of scientists operating within the National Oceanic and Atmospheric Administration. Their task is to assess what the rivers might do.

    The River Forecast Center starts with current land and water conditions: soil moisture, snowpack, stream flow. From that baseline hydrologists feed their model, one by one, with historical weather observations from the years 1981 to 2015. In effect, it’s as if the temperature and precipitation from each year were repeated in today’s world. That produces 35 possible hydrological futures, each representing the past laid on top of the present.

    The Bureau of Reclamation team takes those hydrological futures and uses them in its model of the Colorado River system. The aim of this system model, which includes water inflows and water uses, is to simulate reservoir levels as well as hydropower generation. Fed by the output from the hydrological model, the system model also produces future scenarios, called runs.

    The middle result — the most probable — is the one that is presented in the main 24-month study report. It’s the result that determines how Mead and Powell will be operated. It’s called the most probable because it’s in the middle, if each of the runs was ordered from wettest to driest. It means that historically half the time it was wetter than the middle result and half the time it was drier.

    There are drawbacks to this approach. The runs are not assessed as to how likely they are to occur, which means that a repetition of each of the past years is considered equally likely. The problem: there are more wet years in the 1981 to 2015 period than dry ones. (Runoff in 1983, for instance, was so extremely high that it almost broke Glen Canyon Dam.) Because of this imbalance, the middle result is arguably skewed toward wetter conditions, Lukas said.

    Jerla said there is no scientifically valid way to privilege the likelihood of one outcome over another.

    An update of the River Forecast Center’s data sets will soon help reduce the skew. Cody Moser, a senior hydrologist at the Center, told Circle of Blue that data from the years 2016 through 2020 will be added this fall. Instead of 35 historical hydrologies fed through the models, there will be 40. Adding the drier recent years will push the most probable outcome to a drier result, with reservoir projections in the 24-month study likely pushed downward at the same time…

    The 24-month study is most associated with the most probable scenario. But recently Reclamation has expanded its offerings to include two other reservoir scenarios, now produced monthly: the minimum probable and the maximum probable. The minimum probable is the tenth percentile, meaning the third or fourth driest of those 35 historical hydrologies. The maximum probable is the ninetieth percentile, or the third or fourth wettest historical hydrology.

    For the minimum probable, the tenth percentile of flows is used in the first year of the 24-month study, but the second year of the study is calculated with the twenty-fifth percentile, under the assumption that consecutive extremely bad years would not happen.

    If you look only at the most probable result, you’re not seeing how bad things might plausibly get. Lake Mead today, when it is one-third full, sits at elevation 1,068 feet. The most probable elevation for July 2023 is 1,037 feet, when Mead would be 26 percent full. The minimum probable elevation for that date is 1,027 feet, when the gasping reservoir would be 23 percent full.

    That’s a significant difference in elevation, and if the drier scenario came about it would change basin operations. But even the minimum probable has a flaw. It is not as pessimistic as it could — or maybe should — be.

    “The minimum probable does not represent a worst-case scenario,” Jerla said. “If you wanted to be the ultimate pessimist, which I think probably makes sense given where the system is, things could be worse than what is provided in that minimum probable because it is only the tenth percentile.”

    In other words, the minimum probable is not the minimum possible. There have been years in the last two decades with worse river flow conditions than what is represented by the minimum probable. Things could be drier still.

    As Jerla puts it regarding the minimum and maximum probable: “There is an area above and below those that have futures that folks should be aware of.”

    […]

    Reclamation already runs its five-year projections with what it calls “stress test” hydrology. This scenario is a replication of the years 1988 to 2019, and represents hotter and drier conditions that have settled over the basin. Udall and others argue that Reclamation should consider running its models with an even more stressful test: the years 2000 to 2004, the last time that Lake Powell almost crashed.

    Brad Udall: Here’s the latest version of my 4-Panel plot thru Water Year (Oct-Sep) of 2019 of the #coriver big reservoirs, natural flows, precipitation, and temperature. Data goes back or 1906 (or 1935 for reservoirs.) This updates previous work with @GreatLakesPeck

    “That five-year period is really unique,” Udall explained. Annual runoff averaged 9.4 million acre-feet, a fraction of what coursed through the river throughout the last century. The average annual runoff in the years for the stress test hydrology is about 13.3 million acre-feet. That makes the first years of this century unique, Udall said. And frightening. “There’s nothing like it in the 20th century. It’s stunning how bad a period it is, and we could be in the middle of that right now.”

    […]

    The next update of the five-year projections will come out in early September. Five years is a tricky time frame to analyze, Jerla said. It’s far enough in the future that current conditions lose their predictive power. But it’s close enough to be relevant for farmers, city utilities, and marina operators — all of whom need to plan for near-term water supply. Jerla and her colleagues are trying to thread that needle, thinking hard about how to “provide the public with a good understanding of future outcomes and future risks without confusing the heck out of them.”

    Blue Mesa Reservoir releases to prop up #LakePowell impacting recreation — @AspenJournlism

    The boat ramp at Elk Creek Marina had to be temporarily closed so the docks could be moved out into deeper water. Colorado water managers are not happy that emergency releases from Blue Mesa Reservoir are impacting late summer lake recreation.
    CREDIT: HEATHER SACKETT/ASPEN JOURNALISM

    From Aspen Journalism (Heather Sackett):

    In an effort to prop up water levels at the declining Lake Powell, federal water managers are negatively impacting recreation on Colorado’s biggest man-made lake.

    That’s the message from Colorado water managers and marina operators at Blue Mesa Reservoir in Gunnison County. On Aug. 1, the Bureau of Reclamation, which operates the reservoir, began emergency releases. By the time the releases are finished the first week of October, Blue Mesa is projected to fall to its second-lowest level ever, just 215,000 acre-feet, or 22.8% of its 941,000-acre-foot capacity.

    As of Sept. 1, the reservoir was 37% full, which is about 68 feet down from a full reservoir, and a ring of muddy shoreline was growing. Parking lots and boat slips sat empty, and Pappy’s Restaurant was closed for the season. The dwindling water levels are first impacting Iola, the easternmost of Blue Mesa’s three basins. Iola is where the Gunnison River now cuts through a field of mud.

    Eric Loken, who operates the reservoir’s two marinas (Elk Creek and Lake Fork), said he was given only nine days’ notice to empty Elk Creek Marina’s 180 slips. The dock system’s anchors, which are not built for low water, had to be moved deeper. He said about 25 people lost their jobs six weeks earlier than normal and the marinas lost about 25% of its revenue for the year.

    “There are tons of people who would like to be out here boating and are very disappointed,” Loken said. “Normally on Labor Day weekend, you can barely find a place to park. So it’s definitely been a big hit to us as a business for sure.”

    The Elk Creek Marina and restaurant are closed for the season, although the boat ramp is still open and is expected to be accessible through the end of the month. The Lake Fork Marina is open through Labor Day, but the boat ramp has closed for the season. The Iola boat ramp is restricted to small boats only and is scheduled to close after Labor Day.

    “We are just trying to make it through the holiday weekend and then we will be shutting up this marina too,” Loken said.

    The Bureau announced July 16 that it would begin emergency releases through early October from three Upper Basin reservoirs: 20,000 acre-feet from Navajo, on the San Juan River; 125,000 acre-feet from Flaming Gorge, on the Green River; and 36,000 acre-feet from Blue Mesa, on the Gunnison River. The goal of the releases is to prop up water levels at Lake Powell to preserve the ability to make hydropower at Glen Canyon Dam. The 181,000 acre-feet from the three upstream reservoirs is expected to boost levels at Powell by about 3 feet.

    The three reservoirs are part of the Colorado River Storage Project, and their primary purpose is to control the flows of the Colorado River; flatwater recreation has always been incidental. But the releases at Blue Mesa illustrate the risks of building an outdoor-recreation economy around a highly engineered river system that is now beginning to falter amid a climate change-fueled drought.

    The boat ramp at the Lake Fork Marina closed for the season on Sept. 2 due to declining reservoir levels. The Bureau of Reclamation is making emergency releases out of Blue Mesa Reservoir to prop up levels in Lake Powell and preserve the ability to make hydropower.
    CREDIT: HEATHER SACKETT/ASPEN JOURNALISM

    Timing concerns

    Although the secretary of the Interior can authorize emergency releases without coordination from the states or local entities, Loken, along with some Colorado water managers, is not happy about the timing or the lack of notice from the bureau. Under normal drought-response operations, the federal government would consult with state and local water managers before making releases.

    “We had very little time to handle this decision that was made that none of us have any power over,” Loken said.

    John McClow, general counsel for the Upper Gunnison Water Conservancy District, said Colorado should make noise and complain about what he called a clumsy execution of the releases. McClow has also served on the Colorado Water Conservation Board and is an alternate commissioner on the Upper Colorado River Commission.

    “There’s no reason they couldn’t have waited another couple weeks or another month to release that water from Blue Mesa to get it to Lake Powell,” McClow said. “It goes back to consultation and timing. Had they even asked, it would have been easy to say, ‘Hey, can you wait so you don’t kill our business?’”

    Last month at Colorado Water Congress’ summer conference — a gathering of water managers, researchers and legislators in Steamboat Springs — Rebecca Mitchell, CWCB’s executive director and the state’s representative to the UCRC, told the audience that the impacts of ending the boating season early at Blue Mesa trickle down to all Coloradoans.

    “That means dollars in Colorado. That is who we are in Colorado,” she said. “It’s definitely had an impact in that local community when we talk about the recreation. That is heavy.”

    Mitchell said water managers in the Upper Basin states (Colorado, Utah, New Mexico and Utah) will be carefully monitoring the impacts of the reservoir releases and figuring out how to quantify those impacts, which she called devastating. The states will work with the bureau to develop a plan for how to send water to Lake Powell in future years, taking into consideration the timing, magnitude and duration of the releases, she said.

    “Where can the states and the bureau make the best decisions to lessen the impacts?” she said.

    The National Park Service operates the Curecanti National Recreation area, including the campsites, picnic areas, visitors centers and boat ramps that run the 20-mile length of the reservoir. According to numbers provided by the Park Service, Curecanti gets nearly a million visitors a year. The reservoir is popular among anglers for its trout and Kokanee salmon fishing. Blue Mesa is one of three reservoirs — along with the much smaller Morrow Point and Crystal reservoirs — on the Gunnison River, collectively known as the Aspinall Unit.

    Barefoot Dance In The Snow New York, New York March 8, 1916. Girls of the Marion Morgan School of Dance in Los Angeles perform barefoot in the snow in Central Park. Underwood Archives by Underwood Archives

    Gunnison Country Chamber of Commerce Director Celeste Helminski said her organization is planning an event later this month: the world’s largest snow dance. A big winter would help refill Blue Mesa.

    “The water definitely has me concerned for the future,” she said. “We see a lot of summer recreationists who come and spend the whole summer at several of the campgrounds. It’s just going to take a lot to replace that water. It’s going to take awhile to get back to levels of what recreationists come for.”

    Bureau spokesperson Justyn Liff could not provide any insight into how the timing decision for the releases was made, but pointed out that although lake recreation was impacted, downstream rafting and fishing in the canyon are getting a boost from the roughly 300 cubic-feet-per-second extra water that the releases provide. The Gunnison River below the Gunnison Tunnel diversion, which takes a large portion of the river’s outflow from the Aspinall Unit for delivery to downstream irrigators, was running around 600 cfs the first few days of September, according to USGS stream gauge data. This is a critical data point for boaters running the Black Canyon or Gunnison Gorge sections of the river, which are below the stream gauge. At 600 cfs, the river is flowing 11% above the median for this time of year.

    “If we had waited six weeks, that would have been six weeks less of commercial rafting/guided fishing on the Gunnison River downstream from Aspinall,” Liff said.

    Some boats were still in the water the first week of September at the Lake Fork Marina. Across Blue Mesa Reservoir, the Elk Creek Marina’s boat slips were emptied early because of declining water levels in the reservoir.
    CREDIT: HEATHER SACKETT/ASPEN JOURNALISM

    Hydropower production

    Although the local impacts to recreation are acute, the impacts of not being able to make hydropower at Lake Powell would probably be much worse. The dams of the CRSP are known as “cash register” dams. The power they produce is used to repay the costs of building the project, maintain operations and provide power to millions of people.

    The Western Area Power Administration distributes Lake Powell’s electricity, including to some power providers in Colorado. According to Water Education Colorado, electric costs will surge as Glen Canyon Dam struggles to produce hydropower because of declining water levels.

    The bureau’s target elevation for Lake Powell is 3,525 feet, in order to provide a buffer that protects hydropower generation; if levels fall below 3,490, all power production would stop. Lake Powell is currently about 31% full, at 3,549 feet, which is the lowest surface level since the reservoir began filling in the 1960s and ‘70s. According to projections released by the bureau in July, Lake Powell has a 79% chance of falling below the 3,525 threshold in the next year. The emergency releases are intended to address this.

    “A loss of power generation is a pretty significant issue compared to a few months of boating on Blue Mesa,” McClow said. “Locally, yes, it hurts, but in the big picture, I don’t know if you can make a fair comparison.”

    As water levels at Blue Mesa continue to fall, Loken worries that this may be just the beginning of an era of empty reservoirs.

    “(The releases) don’t solve the long-term problem,” Loken said. “We are just going to end up with an empty Lake Powell and a bunch of empty reservoirs upstream. I think the powers that be really need to put pencil to paper and figure this out.”

    Aspen Journalism covers water and rivers in collaboration with The Aspen Times. For more, go to http://www.aspenjournalism.org.

    #Wyoming preps for less #water as #drought creeps up #ColoradoRiver — WyoFile.com #COriver #aridification

    Photo credit: NPS

    From Wyofile.com (Angus M. Thuermer Jr.):

    As federal water managers declared the first-ever official Colorado River water shortage last week, a top official said he’s confident Wyoming will responsibly implement its plans to store and divert even more flows from the troubled waterway.

    The Department of the Interior on Aug. 16 said it would reduce water diversions to Arizona, Nevada and Mexico in 2022 after a scheduled August review set the restrictive sideboards for releases next year.

    Despite that curtailment, Wyoming plans to corral another 115,000 acre-feet annually by building and modifying dams and their operations to potentially allow more diversions.

    At the same time, Wyoming is fleshing out its Drought Contingency Plan and a “demand management” program that could see voluntary reductions in diversions before users in the state might be cut off. Wyoming doesn’t expect curtailments to happen next year, unless drought, aridification and climate change unexpectedly exacerbate the decline in Lake Powell.

    In a press call announcing the downstream diversion reductions, a regional Bureau of Reclamation director appeared unfazed by the potential impacts of Wyoming’s dam-building plans.

    “Wyoming has exercised foresight in the work of their Wyoming Water Development Commission,” said Wayne Pullan, the BOR’s director for the Upper Colorado River Basin, “and with our long history with Wyoming we’re confident that they’ll pursue any future projects responsibly, fully aware of the context of the hydrology and the difficulties on the Colorado River.”

    Wyoming’s representative to the Upper Colorado River Commission, which will decide how any curtailments in Wyoming, Utah, Colorado and New Mexico will be borne, said his cohorts are “very concerned about the hydrology this basin faces.” A Drought Contingency Plan that’s been adopted in skeleton form “does provide the tools to help manage what we’re seeing now, as troubling as that is,” commission member Pat Tyrrell said at the press call.

    Wyo forges ahead with dams…

    Pullan would not comment on specific ongoing Wyoming projects, at least five of which in the Green River and Little Snake River basins would collectively control an additional 115,000 acre-feet at an estimated cost of $123 million.

    “It is worth noting that one of the purposes of the Colorado River storage project is to assist states, making use of their apportionment under the [1922 Colorado River] Compact,” Pullan said. Wyoming has not developed or appropriated its full share of the water entitled under that historic agreement, state officials have said.

    Lake Powell end of month projections from August 2021 24-month Study. Credit: USBR

    The compact and apportionment among the seven states and Mexico, however, is based on an annual supply of at least 15 million acre-feet, an amount experts say the river basin no longer produces. Further, Wyoming believes the lower basin’s Arizona, Nevada, California and Mexico have historically overused their share while upper division states have not exploited their full rights.

    At least one group has called for a moratorium on new storage or diversion projects in the basin until the seven states and Mexico can address what’s widely seen as claims to flows that no longer exist. Wyoming still deserves its share, state officials believe.

    “We aren’t obligated to sustain overuse anywhere else,” Tyrrell said in an interview, “to the detriment of our existing demands here in Wyoming.”

    Tyrrell offered one scenario where an ongoing dam project could be immediately affected by less runoff. At the Big Sandy Dam in Sublette County, the Bureau of Reclamation is raising the structure to impound an additional 12,900 acre-feet for irrigation.

    “That’ll come under a more recent priority date,” Tyrrell said, meaning the new storage area will be among the first to be cut off if lower-basin shortages creep upstream. The doctrine of prior appropriation that governs water use in Wyoming recognizes the first-in-time water appropriation to be first-in-right when shortages occur.

    “If we are, for example, under any kind of curtailment,” Tyrrell said, Big Sandy “won’t be allowed to fill.

    “It will put no more additional stress on the system if it’s not allowed to fill up,” he told WyoFile.

    Other new dams, reservoir enlargements or operational changes that would give Wyoming access to more water would be subject to separate sideboards depending on whether they are built, what priority of appropriation they might impound, who owns them and other factors.

    The amount of water involved in the Wyoming projects is “very small in comparison to Lake Powell,” Tyrrell said. Powell holds some 20 million acre-feet of what’s called active storage — the amount that can actually be used.

    The downstream reductions — 18%, 7% and 5% of Arizona, Nevada and Mexico’s annual apportionments respectively — amount to 613,000 acre-feet. That’s about 3% of Powell’s storage or, seen another way, about 10% more than Wyoming’s average annual usage of basin flows.

    The impact of any additional consumptive use in Wyoming — which could approach the 115,000 acre-feet contemplated in Wyoming’s dam plans — “is very, very small in comparison to what might be stored in Lake Powell,” Tyrrell said.

    “I believe the environmental impact statement for Big Sandy found there would be no significant impact to reservoir elevations downstream by an enlargement,” he said.

    Wyoming’s legal team stands behind water developers, assistant attorney general Chris Brown said as he echoed Tyrrell’s overview. “We are certainly not obligated to sustain overuse in other places in the basin on the backs of Wyoming water users, either current or future.”

    Water developers, including Wyoming itself, understand the priority system and risks associated with constructing impoundments to hold back flows. In the face of dwindling supply, some wonder whether new structures might become stranded assets — facilities built under one scenario that can’t be used as intended in a new reality.

    A professor of natural resources law at the University of Colorado Law School expressed skepticism about Wyoming’s basin-wide plans. “That seems like a bad investment,” Mark Squillace said in an interview.

    … and plans for curtailments

    Already the Bureau of Reclamation has activated provisions under its Drought Response Operations Agreement to release water from Flaming Gorge Reservoir in Wyoming and Utah. Pullan called the action a “small ‘e’” emergency release that will help keep the level at Powell high enough to continue generating valuable electricity.

    The Flaming Gorge releases and others also help the four upper-basin states meet their water-flow obligations under the 1922 compact, Wyoming’s Tyrrell said. The dwindling flows, he said, “threaten to get worse.”

    WyoFile is an independent nonprofit news organization focused on Wyoming people, places and policy.

    #Colorado water policies will reflect first-ever cuts in Southwest U.S. — The #Greeley Tribune

    The rising sun illuminates the desert landscape near Channel Island at the head of Virgin Canyon in Lake Mead in the Lake Mead National Recreation Area on the Arizona-Nevada border (Photo from Arizona). Photo by Colleen Miniuk-Sperry via American Rivers

    From The Greeley Tribune (Bruce Finley):

    Colorado officials plan to measure use more precisely and pay farmers to send more to Lake Powell

    As federal authorities impose the first-ever mandatory cuts in how much water Arizona, Nevada and Mexico take from the Colorado River, the states higher up the river face rising pressure to divert less.

    That has Colorado officials embarking on an effort to install measuring devices across the Western Slope to precisely account for just how much farmers, ranchers and cities siphon out. The state is also developing a program to pay farmers, cities and industries to use less of their allotted shares of river water so that more could be banked in Lake Powell to meet the state’s legal downriver obligations to California, Arizona and Nevada.

    All of this comes after the summer’s emergency draw-down of Blue Mesa Reservoir near Gunnison and other federal reservoirs to leave more water in the 1,450-mile river.

    Monday’s [August 16, 2021] declaration by the U.S. Bureau of Reclamation orders Arizona to cut the water it draws from Lake Mead by 18% (512,000 acre-feet), Nevada by 7% (21,000 acre-feet) and Mexico by 5% (80,000 acre feet). The cuts must begin next year.

    The feds also declared that Colorado and its upper basin neighbors (Wyoming, Utah and New Mexico) will be allowed to deliver a little less water next year to Lake Powell, reducing the amount measured at the top of the Grand Canyon from 8.23 million acre-feet to 7.43 million acre-feet. That’s because shrinking mountain snow, drought and heat are depleting headwaters, authorities said.

    Brad Udall: Here’s the latest version of my 4-Panel plot thru Water Year (Oct-Sep) of 2019 of the #coriver big reservoirs, natural flows, precipitation, and temperature. Data goes back or 1906 (or 1935 for reservoirs.) This updates previous work with @GreatLakesPeck

    Still, average annual flows of water in the Colorado River Basin have decreased by 19% since 2000, federal records show. And water levels in the Lake Powell and Lake Mead have been falling steadily for years as 40 million people tap the river. This year’s record low levels (both about a third full) triggered the declaration.

    New projections unveiled by federal hydrologists that the river basin will dry out faster than previously expected may trigger additional cuts before 2025 based on states’ agreed-on operating procedures.

    “It’s all connected, one river system, and we’re just in different points of pain,” said Taylor Hawes, Colorado River program director for The Nature Conservancy.

    Scott Hummer, water commissioner for District 58 in the Yampa River basin, checks out a recently installed Parshall flume on an irrigation ditch in this August 2020 photo. Compliance with measuring device requirements has been moving more slowly than state engineers would like.
    CREDIT: HEATHER SACKETT/ASPEN JOURNALISM

    Colorado Division of Water Resources director Kevin Rein met with ranchers and farmers around western Colorado last month seeking guidance on how best to install flumes and other devices to measure how much water they divert…

    Meanwhile, Colorado Water Conservation Board officials have scheduled a working session this month to consider expansion of pilot program efforts to pay farmers, cities and industries to use less water, which analysts have said could cost the state hundreds of millions.

    Board director Rebecca Mitchell, who also represents Colorado in negotiating with other states over the river’s water, said headwaters users “understand the risks and vulnerabilities we face due to severe drought and a potentially hotter and drier future.”

    San Juan #Water Conservancy District votes to oppose BLM water rights applications — The #PagosaSprings Sun #SanJuanRiver #ColoradoRiver #COriver #aridification

    View to the south into the snaking West Fork of the San Juan River as seen from US 160, halfway up to the summit of Wolf Creek Pass. By User:Erikvoss, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=61976794

    From The Pagosa Springs Sun (Jessica Hanson):

    The San Juan Water Conservancy District (SJWCD) board met on Monday, Aug.16, to hear a report, among other business, from the board’s attorney, Jeff Kane, on the Bureau of Land Management’s (BLM) intent to file two applications for water rights.

    According to agenda information posted on the SJWCD website, the two water rights applications are for transmountain diversions to the Rio Grande River basin from a tributary of Wolfe Creek. (Note: This spelling of Wolfe Creek is what is found in the BLM’s original application for water rights.) This is a tributary to the West Fork of the San Juan River.

    These two applications could mean the diversion of up to 20 cubic feet per second (cfs) of water.

    The BLM stated in its applications that the diversion of the water would be to support wildlife management and wetlands habitat at the BLM’s Blanca Wetlands Area and South San Luis Lakes Area.

    According to the memorandum presented to the board by Kane, this means that any authorization of this type of diversion causes 100 percent depletion to the originating stream basin. The water that would be diverted under this water rights application would then not be available to support any uses or habitats in the San Juan River or its
    tributaries.

    The BLM is requesting a change in the places and types of use of the already existing 7 cfs of the Treasure Pass Ditch water right. This water right was purchased in 2019. This current agreement calls for a 1922 priority for the irrigation of 80 acres. The new water rights application by the BLM asks for 13 cfs for the Treasure Pass Ditch and for the right to authorize the BLM to store and deliver water from the Treasure Pass Ditch through several reservoirs in the Rio Grande Basin for support use to the wetlands in the San Luis Valley.

    The BLM is also seeking flexibility in approval so it can use the water it wants to divert from the Treasure Pass Ditch in the Rio Grande Basin in a variety of ways, according to Kane.

    Kane’s report to the board states, “the applications do not limit the ultimate use of diverted water to support wetlands and wildlife.”

    The BLM has the burden of proof when making a request for water rights changes. In a request for a change of water rights, the applicant must prove that the request will not cause an increase in use of requested water as compared in amount, time and place to what has been historically used, according to the memorandum presented by Kane.

    A request for an exchange of water rights is when proof is required of the applicant that the request will not harm or impede other water rights and can be applied, Kane’s memorandum explains. A request for a new water right requires the applicant to provide proof that the water to be used will only be beneficial and that there is actually water available to be diverted.

    As Kane presented his report on the BLM applications to the board, he noted that both the board and its constituents could be adversely affected in many ways.

    The ability of the district to divert and store water under existing water rights or future appropriations considering the diverting water from the Treasure Pass Ditch would not only reduce flows in the San Juan River, but also reduce the water available for Dry Gulch Reservoir, he suggested.

    The report also states that the habitat in the tributaries of the San Juan River may also be impacted. The BLM’s applications could also affect the district’s constituents’ efforts to divert and use water if the event a Colorado Compact call were to arise.

    The Colorado Compact call is the need to reduce the increasing risk of a compact-driven curtailment which could result in cutting of water to users across the upper basin states of Colorado, New Mexico, Arizona, Utah and Wyoming, Kane reported to the SJWCD board.

    Heron Lake, part of the San Juan-Chama Project, in northern New Mexico, looking east from the Rio Chama. In the far distance is Brazos Peak (left) and the Brazos Cliffs (right), while at the bottom is the north wall of the Rio Chama Gorge. By G. Thomas at English Wikipedia – Transferred from en.wikipedia to Commons., Public Domain, https://commons.wikimedia.org/w/index.php?curid=1598784

    Kane also noted that the San Juan-Chama Project is currently diverting an average of 110,000 acre feet a year from the San Juan River to the Rio Grande Basin and the BLM is proposing to divert more water from the Wolfe Creek tribu- tary than at any time in history.

    Kane recommended that the board file statements of opposition to the BLM’s applications.

    The latest E-Newsletter is hot off the presses from the Hutchins Water Center #ColoradoRiver #COriver #aridification

    Colorado River “Beginnings”. Photo: Brent Gardner-Smith/Aspen Journalism

    Click here to read the newsletter. Here’s an excerpt:

    SHORTAGE DECLARATION

    The Bureau of Reclamation has declared the first-ever official shortage for the lower Colorado River basin, which requires delivery cuts to Arizona, Nevada and Mexico under the 2007 Interim Guidelines for operating Lakes Mead and Powell. The determination was made in response to the Mead elevation projected in the August 24-month Study. This Fact Sheet by the Bureau explains how the declaration was made, how much deliveries will be reduced and details about drought response operations. Under the shortage, Arizona will lose about 18% of its Colorado River supplies, the largest cut. This Central Arizona Project page has details on how the cuts will be allocated and how the state is responding.

    As #ColoradoRiver Basin states confront #water shortages, it’s time to focus on reducing demand — The Conversation #COriver #aridification #ActOnClimate


    Water flows into a canal that feeds farms in Casa Grande, Ariz.
    AP Photo/Darryl Webb

    Robert Glennon, University of Arizona

    The U.S. government announced its first-ever water shortage declaration for the Colorado River on Aug. 16, 2021, triggering future cuts in the amount of water states will be allowed to draw from the river. The Tier 1 shortage declaration followed the U.S. Bureau of Reclamation’s forecast that the water in Lake Mead – the largest reservoir in the U.S., located on the Arizona-Nevada border – will drop below an elevation of 1,075 feet above sea level, leaving less than 40% of its capacity, by the end of 2021.

    The declaration means that in January 2022 the agency will reduce water deliveries to the Lower Colorado River Basin states of Arizona and Nevada and to Mexico, but not to California – yet.

    Map of Colorado River Basin.
    The Colorado River Basin drains seven western states. The Lower Basin is more heavily developed than the Upper Basin and consumes more water.
    USGS

    Arizona will lose the most water: 512,000 acre-feet, nearly a fifth of its total Colorado River allocation of 2.8 million acre-feet. Nevada will lose 21,000 and Mexico 80,000. An acre-foot is enough water to cover an acre of land, which is roughly the area of a football field, to a depth of one foot – about 326,000 gallons.

    Central Arizona farmers are the big losers in this first round of cuts. The cities are protected because they enjoy the highest priority in Arizona for water delivered through the Central Arizona Project, a 330-mile canal from the Colorado River. From my experience analyzing Western water policy, I expect that this declaration won’t halt growth in the affected states – but growth can no longer be uncontrolled. Increasing water supply is no longer a viable option, so states must turn to reducing demand.

    Conservation remains the low-hanging fruit. Water reuse – treating wastewater and using it again, including for drinking – is also viable. A third option is using pricing and trading to encourage the reallocation of water from lower-value to higher-value uses.

    Interstate collaboration

    The Colorado River Basin states have formally negotiated who can use how much water from the Colorado River since they first inked the Colorado River Compact in 1922. In 2007 they negotiated interim shortage guidelines that specified how much each state would reduce its use depending on the elevation of Lake Mead. A series of subsequent agreements included Mexico, increased the scale of reductions and authorized the secretary of the Interior, ultimately, to impose truly draconian cuts.

    Arizona suffers the biggest cuts because it agreed in the 1960s that it would have the lowest priority among the Lower Basin states.

    California does not take a cut until the level in Lake Mead drops even lower. But that could happen as soon as 2023. The water level is dropping partly because of the Western drought but also because of the shape of Lake Mead, which was created by damming Boulder Canyon in 1936.

    Like most Western river canyons, Boulder Canyon is wide at the rim and narrow at its base, like a martini glass. As its water elevation drops, each remaining foot in the lake holds less water.

    Lake Mead, the largest U.S. reservoir, has lost 5 trillion gallons of water in the past 20 years.

    Lake Mead feeds Hoover Dam, one of the largest hydroelectric generating facilities in the country. The plant produces electricity by moving water through turbines. When Lake Mead is high, Hoover Dam’s generating capacity is more than 2,000 megawatts, which produces enough electricity to supply some 450,000 average households in Nevada, Arizona and California.

    But the plant has lost 25% of its capacity as Lake Mead has dropped. If the water level declines below about 950 feet, the dam won’t be able to generate power.

    Sending water south

    The Upper Basin states – Colorado, Wyoming, Utah and New Mexico – will also suffer.

    That’s because the Colorado River Compact obligates the Bureau of Reclamation to release an annual average of 8.23 million acre-feet from Lake Powell, the nation’s second-largest reservoir, which extends from southern Utah into northern Arizona.

    The Bureau of Reclamation predicted in mid-July that runoff into Lake Powell for 2021 will total just 3.23 million acre-feet, or 30% of average. To make up for this shortfall, the bureau will release more water from three Upper Basin reservoirs: Flaming Gorge in Utah, Blue Mesa in Colorado and Navajo on the Colorado-New Mexico border.

    These releases will harm farmers and ranchers, who may be forced to raise less-water-intensive crops or fewer animals due to water shortages. The Upper Basin states get much of their water from snowpack, which has declined in recent years as the West warms.

    Doing the math

    The ultimate problem facing the Colorado River Basin states is simple. There are more water rights on paper than there is water in the river. And that’s before considering the impact of climate change and evaporation loss from Lakes Mead and Powell.

    The urgency of the Tier 1 shortage declaration has generated wild-eyed proposals to import water from far-flung places. In May 2021, the Arizona legislature passed a bipartisan resolution calling on Congress to study a pipeline from the Mississippi River that would augment the Colorado River. Space does not permit me to elaborate all the obstacles to this idea, but here’s a big one: the Rocky Mountains.

    Similarly, the city of St. George in southwest Utah has proposed building a 140-mile pipeline from Lake Powell to augment its supply. St. George has some of the highest water consumption and lowest water prices in the country.

    Downtown Phoenix with suburban homes in foreground.
    According to data released on Aug. 12, 2021, from the 2020 Census, Phoenix was the fastest-growing large city in the U.S.
    AP Photo/Ross D. Franklin

    The gospel of growth still motivates some cities. Buckeye, Arizona, on the west side of Phoenix, has a planning area of 642 square miles, which is larger than Phoenix. The city has approved 27 housing developments that officials project will increase its population by 800,000 people by 2040. Yet its water supply depends on unsustainable groundwater pumping.

    Other communities have faced reality. In early 2021 Oakley, Utah, east of Salt Lake City, imposed a construction moratorium on new homes, sending shivers up the spines of developers across the West.

    Enabling farmers to be more efficient

    The Tier 1 declaration gives states and local communities reason to remove barriers to transferring water. Market forces are playing an increasingly critical role in water management in the West. Many new demands for water are coming from voluntary transfers between willing sellers and desperate buyers.

    Water markets threaten rural communities because farmers cannot hope to compete with cities in a free market for water. Nor should they have to. Water remains a public resource. I believe the states need a process to ensure that transfers are consistent with the public interest – one that protects the long-term viability of rural communities.

    As the West enters an era of water reallocation, most of the water will come from farmers, who consume more than 70% of the region’s water. Cities, developers and industry need only a tiny fraction of that amount for the indefinite future.

    What if municipal and industrial interests created a fund to help farmers install more efficient irrigation systems instead of simply flooding fields, a low-tech approach that wastes a lot of water? If farmers could reduce their water consumption by 5%, that water would be available to cities and businesses. Farmers would continue to grow as much food as before, thus protecting the stability of rural communities. This could be a win-win solution to the West’s water crisis.

    [You’re smart and curious about the world. So are The Conversation’s authors and editors. You can read us daily by subscribing to our newsletter.]The Conversation

    Robert Glennon, Regents Professor and Morris K. Udall Professor of Law & Public Policy, University of Arizona

    This article is republished from The Conversation under a Creative Commons license. Read the original article.

    Reclamation announces 2022 operating conditions for #LakePowell and #LakeMead #ColoradoRiver #COriver #aridification #ActOnClimate

    Here’s the release from the Bureau of Reclamation (Patti Aaron and Becki Bryant):

    The Bureau of Reclamation today released the Colorado River Basin August 2021 24-Month Study. This month’s study projections are used to set annual operations for Lake Powell and Lake Mead in 2022. Releases from these massive reservoirs are determined by anticipated reservoir elevations.

    General map of the Colorado River Basin, depicting the Upper and Lower Basins, and the Grand Canyon ecoregion. Map credit: ResearchGate

    Most of the flow of the Colorado River originates in the upper portions of the Colorado River Basin in the Rocky Mountains. The Upper Basin experienced an exceptionally dry spring in 2021, with April to July runoff into Lake Powell totaling just 26% of average despite near-average snowfall last winter. The projected water year 2021 unregulated inflow into Lake Powell—the amount that would have flowed to Lake Mead without the benefit of storage behind Glen Canyon Dam—is approximately 32% of average. Total Colorado River system storage today is 40% of capacity, down from 49% at this time last year.

    Given ongoing historic drought and low runoff conditions in the Colorado River Basin, downstream releases from Glen Canyon Dam and Hoover Dam will be reduced in 2022 due to declining reservoir levels. In the Lower Basin the reductions represent the first “shortage” declaration—demonstrating the severity of the drought and low reservoir conditions.

    “Like much of the West, and across our connected basins, the Colorado River is facing unprecedented and accelerating challenges,” said Assistant Secretary for Water and Science Tanya Trujillo. “The only way to address these challenges and climate change is to utilize the best available science and to work cooperatively across the landscapes and communities that rely on the Colorado River. That is precisely the focus of the White House Interagency Drought Working Group—a multi-agency partnership created to collaborate with States, Tribes, farmers and communities impacted by drought and climate change to build and enhance regional resilience.”

    “Today’s announcement of a Level 1 Shortage Condition at Lake Mead underscores the value of the collaborative agreements we have in place with the seven basin states, Tribes, water users and Mexico in the management of water in the Colorado River Basin,” said Reclamation Deputy Commissioner Camille Touton. “While these agreements and actions have reduced the risk, we have not eliminated the potential for continued decline of these critically important reservoirs. Reclamation is committed to working with all of our partners in the basin and with Mexico in continuing to implement these agreements and the ongoing work ahead.”

    Plans that have been developed over the past two decades lay out detailed operational rules for these critical Colorado River reservoirs:

    • Based on projections in the study, Lake Powell will operate in the Mid-Elevation Release Tier in water year 2022 (October 1, 2021 through September 30, 2022), and Lake Mead will operate in its first-ever Level 1 Shortage Condition in calendar year 2022 (January 1, 2022 through December 31, 2022).
    • Lake Powell Mid-Elevation Release Tier: The study projects Lake Powell’s January 1, 2022, elevation to be 3,535.40 feet – about 165 feet below full and about 45 feet above minimum power pool. Based on this projection, Lake Powell will operate in the Mid-Elevation Release Tier in water year 2022. Under this tier, Lake Powell will release 7.48 million acre-feet in water year 2022 without the potential for a mid-year adjustment in April 2022.
    • Lake Mead Level 1 Shortage Condition: The study projects Lake Mead’s January 1, 2022, elevation to be 1,065.85 feet – about 9 feet below the Lower Basin shortage determination trigger of 1,075 feet and about 24 feet below the drought contingency plan trigger of 1,090 feet. Based on this projection, Lake Mead will operate in a Level 1 Shortage Condition for the first time ever. The required shortage reductions and water savings contributions under the 2007 Colorado River Interim Guidelines for Lower Basin Shortages and Coordinated Operations of Lake Powell and Lake Mead, 2019 Lower Basin Drought Contingency Plan and Minute 323 to the 1944 Water Treaty with Mexico are:- Arizona: 512,000 acre-feet, which is approximately 18% of the state’s annual apportionment

      – Nevada: 21,000 acre-feet, which is 7% of the state’s annual apportionment

      – Mexico: 80,000 acre-feet, which is approximately 5% of the country’s annual allotment

    In July 2021, drought operations to protect Lake Powell were implemented under the Upper Basin Drought Response Operations Agreement which project releasing up to an additional 181,000-acre feet of water from upstream initial units of the Colorado River Storage Project to Lake Powell.

    Relying on the best available scientific information to guide operations, investing in water conservation actions, maximizing the efficient use of Colorado River water and being prepared to adopt further actions to protect the elevations of Lake Powell and Lake Mead remains Reclamation’s priority and focus.

    Lake Mead. Photo: Chris Richards/Flickr (CC BY-NC-ND 2.0) via Audubon

    From Audubon (Jennifer Pitt):

    The U.S. Bureau of Reclamation today announced that 2022 will bring unprecedented water shortages to Arizona, Nevada and the Republic of Mexico. The shortage determination follows release of a forecast of water supply in the Colorado River’s reservoirs, indicating that levels continue precipitous decline.

    While last year’s snowpack was decent, extraordinarily warm temperatures through the spring meant that by the time the snow melted and flowed into Colorado River reservoirs much of it had evaporated, and the year’s water supply was only 32% of the 30-year average. Since 2000, the decline in Colorado River reservoir elevations has been dramatic, and scientists studying climate change tell us there is no end in sight.

    As we watch climate change impacts unfold before our eyes, we worry about the birds and other wildlife that depend on Colorado River (and tributary) habitats. We worry about the communities that rely on Colorado River water supply. We also worry about how decision-makers will respond, because in a crisis, environmental resources will be at risk.

    Graphic via Audubon

    In recent years, the U.S. and Mexican federal governments and states that share the Colorado River have adopted shortage rules (2007 Interim Guidelines, Minute 323, Colorado River Drought Contingency Plans). That is important, because it allows water users to plan ahead for dry times with some predictability, even in extraordinary drought. Arizona, Nevada and Mexico all have known the 2021 shortage is coming. On a short-term basis, they have plans to mitigate the shortages. Arizona, which will take by far the biggest cuts, will employ diverse strategies including temporarily buying water from willing sellers (funded by Arizona taxpayers and philanthropies), increased water releases from in-state reservoirs, and increased groundwater pumping.

    These are good strategies for the short-term, but what about 2023 and beyond? Historically, water management was based on the premise that drought would be followed by wet years. Climate change means we can no longer make that assumption. Good short-term solutions may not be sustainable: Will public and philanthropic funds remain available over the long term? Local reservoirs will need to be refilled with Colorado River water, so what happens once they are emptied? How long can water users rely on fossil groundwater before that resource is threatened as well?

    A recent report from Audubon and conservation partners suggests that we need to start investing now in solutions for the long term, including improving forest health, wetlands restoration, and regenerative agriculture. These practices improve soil health such that over time more of the snowpack will translate into water supply as well as improved resilience of the entire watershed.

    Good planning and robust investments can help minimize the pain of Colorado River water shortages, and are critical to maintaining reliable water supplies for people and nature alike. It is reassuring that the United States and Mexico have held fast to their commitments to provide a small volume of water to the Colorado River Delta, and the river has been flowing to the sea this summer.

    The Colorado River is due for new operating rules in 2026, and Audubon will be working hard to ensure that the results are designed for the 21st century, starting with a process that includes all stakeholders, including Native American tribes with Colorado River water rights and environmental interests. Our goals include a new management framework that stabilizes reservoirs as the water supply declines, robust public investment in long-term strategies to improve the water supply and the basin’s resilience, measures that ensure tribes benefit from their water rights, and that decision-makers do not raid the last drops of water supporting habitats Colorado River habitats.

    From The Nature Conservancy (Lindsay Schlageter):

    Due to the low levels of water, the federal government has declared a Tier 1 water shortage in the Colorado River for the first time ever. This declaration reduces the amount of water that Arizona, Nevada and Mexico can claim from the river.

    “The Tier 1 shortage declaration highlights the challenges facing the Colorado River Basin; however, this did not come as a surprise,” says Taylor Hawes, The Nature Conservancy’s Colorado River Program Director. “The Colorado River has witnessed a steady decline in flows since 2000 that impacts communities, agriculture, industry, and the health of our rivers in the region. Even as flows decreased, our demand reductions have not kept pace.”

    The declaration not only reduces the amount of water available for cities, but it will likely restrict water supplies for farmers. Some farmers may be forced to sell cattle, switch to different crops, or use groundwater from wells.

    Colorado River Hit Hard by Climate Change

    The Colorado River provides drinking water for more than 40 million people, hydroelectric power to meet the needs of over 7 million people, and water for 30 Native American Tribes. It irrigates around 5 million acres of fields that supply vegetables to the entire world and supports a thriving $26-billion recreation and tourism economy, as well as a wide variety of wildlife.

    But climate change is hitting the Colorado River hard. The West has been in the grip of a drought for over 20 years that scientists believe is the worst in a thousand years, and the river is starting to feel the pinch. Its flows are powered by snowmelt in the Rocky Mountains, and as precipitation declines across the region, the river’s supply has dwindled too. Higher year-round temperatures also mean that the water evaporates faster while water use increases. These challenges make it harder and harder to balance the needs of people and the fish and wildlife that depend on healthy, flowing rivers.

    “The Colorado River can be a model for resiliency and sustainability but not without a concerted and significant effort by stakeholders in the region,” Says Hawes. “While stakeholders have been developing solutions and adapting to a drier future, we must all accelerate the pace. We need short term solutions to stabilize the system while also working on longer term solutions. These include reducing water use across sectors, modernizing infrastructure, improving forest health, enhancing natural infrastructure, using technology to bolster groundwater levels, and improving stream and river health.”

    LOW WATER LEVELS Water levels in Lake Powell and Lake Mead, the two major reservoirs that store the Colorado River’s water, are down to 34% of their capacity and may soon drop too low to spin the hydroelectric turbines in their dams. © Jason Houston via the Nature Conservancy

    Leading on Innovative and Collaborative Solutions

    Already, water levels in Lake Powell and Lake Mead, the two major reservoirs that store the Colorado River’s water, are down to 34% of their capacity and may soon drop too low to spin the hydroelectric turbines in their dams. Some smaller reservoirs began emergency releases in summer 2021 to prop up water levels in these lakes.

    The situation is serious, but there’s plenty we can do to improve it. We know that the West will continue to get hotter and drier due to climate change. By proactively working together and planning for this future, we can share the Colorado River’s water equitably among all those who need it, including nature. We can use water more efficiently in our homes and businesses, improve agricultural irrigation infrastructure, adopt innovative water sharing approaches, and plant crops that use less water. With proper planning, the river will have enough water for fish and animals as well as people.

    “Water issues are complex and require partnership and collaboration,” says Hawes. “The Nature Conservancy has worked in the Colorado River Basin for 20 years and appreciates the critical importance of partnerships in charting a sustainable and resilient future. However, the river system has changed more quickly than we have adapted. We must accelerate our efforts and think more broadly and creatively than ever before to chart a sustainable course. We must work together, testing ideas, sharing knowledge and investing in both short-term and long-term solutions in order to have the greatest impact in a short amount of time. This approach is our best path forward to minimize more future shortages on the river.”

    With our contacts in the region and our history of bringing diverse stakeholders together, TNC is ideally situated to broker agreements that keep the Colorado River healthy. In Colorado, we developed the Yampa River Fund, a compact in which downstream users pay to protect the health of their water supply near its source. In Arizona, we developed a groundwater recharge system and helped farmers switch to water-efficient crops. We helped Mexicali, Mexico, invest in wastewater treatment solutions to leave more water available for nature. We are supporting policies at local, regional, and national levels that safeguard water supplies in the arid West.

    Las Vegas has reduced its water consumption even as its population has increased. (Source: Southern Nevada Water Authority)

    Here’s a release from the Southern Nevada Water Association (Bronson Mack):

    Low water levels in Lake Mead prompted the federal government today to issue a water shortage declaration on the Colorado River, which will reduce the amount of water Southern Nevada will be allowed to withdraw from Lake Mead beginning in January 2022.

    Combined with existing water reductions outlined in the Drought Contingency Plan, the declared shortage will cut Southern Nevada’s annual water allocation of 300,000 acre-feet from Lake Mead—the source of 90 percent of the community’s supply—by a total of 21,000 acre-feet (nearly 7 billion gallons of water) in 2022.

    “During the past two decades, Southern Nevada has taken significant steps to prepare for these cuts, including constructing Intake 3 and Low Lake Level Pumping Station and storing unused water in reserve for our community’s future use,” said Southern Nevada Water Authority (SNWA) General Manager John Entsminger. “But water conservation remains our most effective management tool, and now is the time for all of us to redouble our conservation efforts in order to remain ahead of the curve and continue protecting the investments we have all made in our community.”

    Entsminger said Southern Nevada must continue to reduce outdoor water consumption—which accounts for about 60 percent of the region’s overall water use—by following mandatory seasonal watering restrictions, replacing unused grass landscapes with drip-irrigated trees and plants through the SNWA’s Water Smart Landscapes rebate program (WSL), and preventing and reporting water waste (water flowing off a property into the gutter) to local water utilities.

    “Southern Nevada has the capability, the obligation, and the need to be the most water-efficient community in the nation,” Entsminger said. “We already safely treat, recycle and return indoor water use back to Lake Mead, so conserving the water we use outdoors will help us achieve that goal and ensure our long-term sustainability.”

    While the shortage declaration is the first of its kind, it is not the first time Southern Nevada was required to reduce its water use in response to drought conditions and a hotter, drier climate. When the drought was first declared in 2002, Southern Nevada was using more than its legal entitlement of 300,000 acre-feet of Colorado River water. However, the community’s commitment to conservation led to a 23 percent decline in water use since 2002 despite the addition of nearly 800,000 new residents.

    But conservation progress has stalled in recent years. As an example, only about half of single-family households comply with the year-round seasonal watering restrictions, which limits the number of days landscapes can be watered each season. If every water user diligently followed these restrictions each season, Southern Nevada could save more water than is being cut under the shortage conditions.

    In addition, tens of millions of gallons go to waste each year as poor irrigation practices result in water flowing off properties. Reporting this waste to local water utilities helps educate property owners about the issue and gives them an opportunity to correct it. However, those that continue to waste water receive a violation and a water-waste fee.

    “In the face of this unprecedented shortage, we must step-up our commitment to conservation,” Entsminger said. “These efforts are imperative to assure our community’s long-term economic success—and history has shown that they work.”

    For information on what you can do to conserve water, including SNWA conservation programs, seasonal watering restrictions, and preventing and reporting water waste, visit http://snwa.com.

    A longer walk from the dock to the water is in store for boaters at the Elk Creek marina, Blue Mesa Reservoir. Blue Mesa is being drawn down to feed critically low Lake Powell, as continued dry weather and rising demand deplete the Colorado River.
    (Courtesy photo/National Park Service) via the Montrose Daily Press

    From The Colorado Sun (Michael Booth):

    The federal government declared a water shortage on the Colorado River for the first time since a compact between seven river basin was inked a century ago, with major 2022 water delivery cutbacks for Arizona and a lesser amount for Nevada and the nation of Mexico.

    But water resource experts warned Coloradans not to be smug about far-away troubles in Arizona, where central state farming methods and production will take a big hit. The duty of Upper Colorado River Basin states to continue delivering set quotas of water under the treaty is one of the next big climate change battles in the West, and it will force changes here at home.

    “The announcement today is a recognition that the hydrology that was planned for years ago, that we hoped we would never see, is here today,” Camille Touton, deputy commissioner for the Bureau of Reclamation, said at a news conference bringing together officials from all the compact states.

    “It’s really a threshold moment,” said Bart Miller, healthy rivers program director for the nonprofit Western Resource Advocates. “They are words a water manager doesn’t like hearing: unprecedented, never done this before. That short-term response is a good one, but the longer term response might be most interesting.”

    At the news conference Monday, the U.S. Bureau of Reclamation officially announced what its previous reports had warned was coming: Drought and climate change have drained so much water from the Lower Basin compact states’ main pool, Lake Mead, that the most junior rights on the lower river must be suspended until supplies are restored.

    “They will not be delivered the water,” said Tom Buschatzke, director of Arizona Department of Water Resources. “They will physically not have the water, and they will have to figure out how to deal with the ramifications of that outcome.”

    Arizona, with primarily junior water rights for its Central Arizona Project canals that take farm water into the desert, will lose more than 500,000 acre-feet from its projected allotment for 2022. That’s about 18% of the state’s usual allotment from the Colorado River.

    Nevada will lose 21,000 acre-feet, or about 7% of its planned 2022 allotment; Mexico, which has a treaty with the U.S. over Colorado River water, will lose 80,000 acre-feet, or about 5% of its annual total.

    Though the 22-year drought in the West prompted years of contingency planning for the river that delivers water to 40 million people, failing snowpack and dry soils that drink up runoff have forced federal regulators to speed their efforts…

    Earlier this summer, another contingency move triggered by the drops at Mead and Powell included partial draining of Blue Mesa Reservoir near Gunnison to help refill Powell and keep its pool above the minimum level needed for generating hydroelectric power. Federal regulators also moved water down to Powell from Flaming Gorge Reservoir on the Wyoming-Utah border, and Navajo Reservoir straddling the Colorado-New Mexico border.

    All the compact states will have to contribute to solutions as the drought continues, federal and state officials warned.

    “We also recognize the very real possibility that the hydrology that was planned for years ago may not be the worst that the basin may see in the future,” Touton said…

    There are a few ways Colorado and federal water managers are working on to leave more water in the river, Miller said:

  • Improving the efficiency of agriculture — which uses 85% of the water available in Colorado — through fixing canals and ditches and moving to drip irrigation when possible. Capital costs could be funded in part by the infrastructure bill on the verge of passage by Congress, some of which was earmarked for water projects.
  • Changing crops to those that take less water. Arizona gets criticized for using Colorado River water to irrigate cotton, alfalfa and other high-water crops in an arid climate, but most of western agriculture takes place in a high desert. Colorado farmers could switch from alfalfa and other fodder to rye or other crops.
  • Letting water go through “demand management.” Cities have been drying up farms for their water rights for decades, raising the anger of rural Colorado. Demand management, by contrast, can rent the water from farmers for a set number of years in a given period, without drying up the land or the water rights entirely. Renting the water takes big money, though, another possible use of infrastructure stimulus.
  • City water conservation. Front Range cities have come a long way providing household water to millions of new residents without taking more water overall, Miller said, but those efficiency gains are slowing. Still, the cities could make additional trims: Las Vegas spends large amounts buying up lawn grass and paying homeowners to keep low-water or zero-water plantings.
  • “There’s still more there,” Miller said.

    The Roaring Fork River (left) joins with the Colorado River in downtown Glenwood Springs. CREDIT: HEATHER SACKETT/ASPEN JOURNALISM

    From Colorado Public Radio (Michael Elizabeth Sakas):

    What does this water shortage mean for Colorado? Nothing, legally.

    Lake Mead stores water for the states in the lower Colorado River basin — that’s Nevada, Arizona and California. Because Lake Mead has dropped below 1,075 feet, the U.S. Bureau of Reclamation can mandate water cuts in Arizona and Nevada…

    Currently, Colorado and this group of states are complying with the water-sharing agreement. The upper basin is not legally at fault for the low levels in Lake Mead.

    “When we hear a shortage declaration, that definitely causes angst,” said Becky Mitchell, director of the Colorado Water Conservation Board. “But I do feel like it’s a call to action both in the upper basin and the lower basin.”

    Mitchell said all of the states in the Colorado River basin are working to manage “this very precious resource,” so that federal emergency actions like this are rare.

    The official shortage declaration in the lower-basin states does add pressure to renegotiations of the Colorado River’s existing management guidelines, which are set to expire in 2026.

    “It is much easier to make decisions in times of plenty,” [Rebecca] Mitchell said. “But the decisions are more important in times like now, and they have a greater impact.”

    Aerial photo – Central Arizona Project. The Central Arizona Project is a massive infrastructural project that conveys water from the Colorado River to central and southern Arizona, and is central to many of the innovative partnerships and exchanges that the Gila River Indian Community has set up. Public Domain, https://commons.wikimedia.org/w/index.php?curid=326265

    From Tucson.com (Tony Davis):

    But additional cuts affecting more people may be coming more quickly than anticipated until now, officials said at a news conference called to make the formal announcement of the river’s first shortage declaration.

    The shortage declaration by the bureau will reduce deliveries to the Central Arizona Project by roughly one-third, or 512,000 acre-feet.

    Besides farmers, these cuts will also affect some Indian tribes, “excess water” deliveries to parties who normally buy water that other users don’t have contracts for and recharge of CAP water into various underground storage basins.

    The cuts for Arizona, Nevada and Mexico together will be about 613,000 acre-feet, although California will have no cuts in 2022. An acre-foot is enough water to cover a football field one-foot deep with water. The cuts were all prescribed by the 2019 drought contingency plan, an agreement among the seven Colorado River Basin states including Arizona that sought to prop up Lakes Mead and Powell by gradually reducing the states’ take of that water when reservoirs declined to low enough elevations.

    But Arizona’s water chief indicated at the news conference that to keep already ailing Lake Mead from falling too low, the three Lower Colorado River Basin states including Arizona will need to take additional water-saving actions beyond what’s already planned. That additional action is legally required under the three-state drought contingency plan, because the latest bureau forecast says it’s possible that Mead could drop to close to critically low levels by June 2023.

    The state representatives have already started meeting to discuss possible future cuts, Tom Buschatzke, Arizona Department of Water Resources director, told the news conference without providing much more detail.

    “The tools we have to achieve the goal are conserving more water in Lake Mead and reducing water use,” Buschatzke said. “This is a serious turn of events, not a crisis…

    …at a separate news conference held after the one held by officials, a group of environmentalists and the head of a huge Southern California irrigation district blasted as grossly inadequate the efforts of federal and state officials to respond to declines in Colorado River flows that have drastically lowered its reservoirs’ water levels since 2000.

    They said that despite the much-touted drought plan the basin states approved in 2019, the states and feds really don’t have a long-term plan to bring the river into balance between how much water people use and how much nature provides.

    Spray irrigation on a field in the Imperial Valley in southern California. This type of irrigation is a lot better than the extremely water inefficient type of flood irrigation that is popular in this region. Still, in the high temperatures of this desert region a lot of the water evaporates, leaving the salts, that are dissolved in the colorado River water that is used, on the soil.

    “This is not the time for small steps, this is a time for large ones,” said J.C. Hamby, director of the Imperial Irrigation District, headquartered in El Centro, California, near Yuma. “This is a tremendous problem that requires tremendous solutions, bold solutions, to respond to the continued drawdown on Powell and Mead.”

    The drought contingency plan is only a plan to manage reservoir levels, not to truly adapt to long-term declines in river flows triggered by climate change and the accompanying warming weather, added Zachary Frankel, director of the Utah Rivers Council.

    “There is not a climate plan for the Colorado River, it’s just the federal government and states watching the reservoir levels drop,” Frankel said.

    The bureau’s CAP cuts for 2022 will take away about 60 percent of the Pinal farmers’ current CAP supplies of about 250,000 acre feet a year, said Paul Orme, a Phoenix attorney representing four Central Arizona irrigation districts. In 2023, the Pinal farmers’ share of CAP will shrink to zero, as prescribed by the 2019 drought plan, he said…

    The latest bureau forecast for the end of 2022 is more dire still. The most likely lake level then will be barely above 1,050 feet, the bureau’s monthly 24-month study said. If Mead drops below 1,050 feet at the end of any calendar year, additional cuts kick in, affecting some Phoenix-area cities, Indian tribes and some industrial users, although Tucson wouldn’t be affected.

    Arizona, Nevada and Mexico would lose a total of 613,000 acre-feet under that scenario, although California would lose no Colorado River water unless the lake drops below 1,045 feet…

    But the bureau’s latest forecast also predicts that under the worst case climate scenario, Lake Mead could hit 1,030 feet by June 2023. If a forecast predicts the lake will fall that low within the next two years, the drought contingency plan requires the basin states to start meeting and find additional water use cuts to keep Mead.

    The purpose of such cuts would be to keep Mead from dropping to 1,020 feet or below. The 1,020 foot level is five feet below the lowest level now planned for in the drought contingency plan, a level that would for the first time require cuts to Tucson’s CAP supply of 144,000 acre-feet…

    The environmentalists and Hamby, however, said the reservoirs’ continued declines shows that it’s folly for Upper Basin states such as Utah and Wyoming to keep pushing to build more water diversion projects such as the Lake Powell pipeline. It would take 86,000 acre-feet a year of water — almost as much as Tucson Water customers use in a given year — from the lake to fast-growing St. George, Utah.

    Lake Powell Pipeline map via the Washington County Water Conservancy District, October 25, 2020.

    From The St. George Spectrum (Joan Meiners):

    Cuts to Colorado River apportionments announced Monday by the U.S. Bureau of Reclamation triggered a new flood of protests against St. George’s Lake Powell Pipeline project, the largest proposed diversion of additional water from this river that serves the needs of 40 million people throughout the West.

    “St. George is not going to get their pipeline,” said Robin Silver, a founder of the Center for Biological Diversity and a former Phoenix emergency-room physician, in a press conference hosted by environmental groups on Monday afternoon following the one held by the Bureau of Reclamation. “Whether they’re listening or not, they’re going to have no choice. But it’d be nice if they were listening so we could all figure out how to get out of this fix.”

    The Lake Powell Pipeline is the Washington County Water Conservancy District’s (WCWCD) solution to the current rate of population growth outpacing its estimation of the local water supply. The project, which has been pursued by the state since the 1990s, would transport up to 28 billion gallons of water per year — enough to support around 150,000 households — from the Colorado River at Lake Powell 140 miles through the desert in a buried pipeline to Sand Hollow Reservoir for use by future St. George residents.

    Despite the long history of the project and the $40 million the state of Utah has already spent on feasibility and environmental studies for it, however, the current megadrought has created a region-wide political climate where additional diversions from the Colorado River are becoming increasingly controversial.

    Colorado River February 2020. Photo: Abby Burk via Audubon Rockies.

    From AZCenral.com (Ian James and Zayna Syed):

    The declaration of a shortage by the U.S. Bureau of Reclamation has been anticipated for months and was triggered by the spiraling decline of Lake Mead, which stores water used by Arizona, Nevada, California and Mexico…

    West Drought Monitor map August 10, 2021.

    Federal water managers said the first shortage declaration shows how severe the drought has become and how climate change is having serious effects on the river…

    “The Bureau of Reclamation cannot control the hydrology. And we also recognize the very real possibility that the hydrology that was planned for years ago may not be the worst that the basin may see in the future,” Touton said. “This may also mean that additional actions will likely be necessary in the very near future.”

    […]

    The cuts will be the largest to date on the river, shrinking the flow of water through the 336-mile Central Arizona Project Canal, which for more than three decades has supplied Arizona’s growing desert cites and vast stretches of farmlands.

    Farmers in part of central Arizona will face major cutbacks in water deliveries next year, and they’re preparing for the supplies to be entirely shut off in 2023. The reductions will force growers in Pinal County to leave some fields dry and unplanted, while the state is providing funds to help local irrigation districts drill wells to pump more groundwater.

    “The cutbacks are happening. The water’s not there,” said Will Thelander, whose family has been farming in Arizona for three generations. “We’ll shrink as much as we can until we go away. That’s all the future basically is.”

    […]

    The announcement from the Bureau of Reclamation, which is based on projected reservoir levels over the next two years, also shows that even bigger cuts are possible in 2023 and 2024, meaning some Arizona cities could begin to see their water deliveries slashed as well.

    The level of Lake Mead is projected to end the year at an elevation of 1,065 feet, putting the river’s Lower Basin in what’s called a tier-one shortage. The government’s estimates show the reservoir is likely to continue to fall in subsequent years toward lower-level shortages that would bring larger cuts.

    The reductions are taking effect under a 2019 agreement called the Drought Contingency Plan, which was aimed at reducing the risks of Lake Mead falling to critical lows. But as extreme heat and unrelenting drought have persisted across much of the watershed, the levels of the Colorado’s largest reservoirs have fallen faster than had been expected.

    “There’s no doubt that climate change is real. We’re experiencing it every day in the Colorado River Basin and in other basins in the West,” Assistant Secretary for Water and Science Tanya Trujillo said. “I think the best strategy for planning is to think about a broad range of scenarios and a broad range of potential hydrology, and to work closely with our partners in the basin to try to think through all of those scenarios.”

    The 2019 drought agreement included a backstop provision that called for the states to reconvene to consider additional measures, if necessary, to guard against the risk of Lake Mead falling to critically low levels below the elevation of 1,020 feet. Tom Buschatzke, director of the Arizona Department of Water Resources, said the state’s officials have begun to meet to discuss options with representatives of California and Nevada.

    While they haven’t yet determined exactly what additional actions they may take, Buschatzke said, the possible steps include reducing the amounts taken from Lake Mead and conserving water in the reservoir…

    Representatives of Nevada and California echoed that willingness to cooperate.

    “We must adapt to the new reality of a warmer, drier future,” said John Entsminger of the Southern Nevada Water Authority. “While the future is sobering, we are in this together.”

    […]

    With Lake Mead projected to continue dropping, water researchers have also warned that the cuts agreed to under the 2019 agreement now are insufficient to deal with the severity of the situation, and that the region will soon need bigger efforts to adapt.

    “We’re in an all-hands-on-deck situation. And we have to figure out how we get along with less Colorado River water coming into the state,” said Sarah Porter, director of the Kyl Center for Water Policy at Arizona State University. “I would say that everything’s on the table. How do we continue to have our cities and our economy and quality of life and prosperity on significantly less Colorado River water?”

    Porter said the rapid declines of the river’s reservoirs show that the 2019 drought deal won’t be enough and that Arizona and neighboring states need to “figure out strategies to make sure that the Colorado system can stay functional” over the next several years…

    Growers in Pinal County have said they may have to stop irrigating about a third of the area’s farmlands, leaving them dry and fallow…

    Growers in Pinal County have known for years that their supply of CAP water would eventually be cut off, with a 2004 settlement outlining a schedule of decreasing water deliveries between 2017 and 2030. But the 2019 shortage agreement and the deteriorating conditions at Lake Mead have meant that Pinal farmers will lose their supply of Colorado River water much sooner…

    Brad Udall: Here’s the latest version of my 4-Panel plot thru Water Year (Oct-Sep) of 2019 of the #coriver big reservoirs, natural flows, precipitation, and temperature. Data goes back or 1906 (or 1935 for reservoirs.) This updates previous work with @GreatLakesPeck

    Water’s retreat has accelerated

    The Colorado River provides water for cities, tribal nations and about 4.5 million acres of farmland from Wyoming to the U.S.-Mexico border. About 70% of the water diverted from the river in the U.S. is used for agriculture, flowing to fields of hay and cotton, fruit orchards and farms that produce much of the country’s winter vegetables.

    The watershed has been hit by one of the driest 22-year periods in centuries. Scientists describe the past two decades as a megadrought worsened by climate change, and say long-term “aridification” of the Colorado River Basin will require the region to adopt substantial changes to adapt to getting less water from the river.

    In 2000, Lake Mead was nearly full. Since then, the water level in the reservoir has fallen about 147 feet, leaving a growing “bathtub ring” of minerals coating the rocky shores. The water’s retreat has accelerated over the past year during months of severe drought and extreme heat…

    Arizona and Nevada took less water from the river in 2020 and 2021 under the agreement among Lower Basin states, and Mexico has been contributing water agreed under a separate accord to help the levels of Lake Mead.

    California agreed to start taking cuts at a lower trigger point (1,045 feet) if the reservoir continues to fall — which the latest projections show could occur in 2024.

    When the deal was signed, some of the states’ representatives described the agreement as a temporary “bridge” solution to lessen the risks of a crash and buy time through 2026, by which time new rules for sharing shortages will need to be negotiated and adopted.

    Atmospheric CO2 at Mauna Loa Observatory August 7, 2021.

    Climate change ‘is making us face this reality quicker’

    The deal wasn’t intended to prevent a shortage, which managers of water agencies have been expecting for the past few years. But the shortage has arrived sooner than officials and observers had hoped.

    “We are in unprecedented territory,” said Haley Paul, policy director for the National Audubon Society in Arizona…

    “In the end, hydrology is catching up to us and climate change is here and we’re hitting this new threshold,” Paul said. “Climate change is making us face this reality quicker than we would have otherwise. And we have no other choice but to learn to live with this smaller river.”

    Scientific research has shown that the Colorado River watershed is sensitive to the higher temperatures caused by climate change, which intensify dry conditions and evaporate more moisture from the landscape. In a 2018 study, researchers found the river’s flow since 2000 had dropped 19 percent below the average of the past century, and that about half of the trend of decreasing runoff was due to unprecedented warming in the river basin.

    Paul said the shortage might spur more water-efficiency innovation on top of what’s already been done, or more cultivation of crops that require less water.

    “Does this shift how we farm? Both in the crops and the traditional ways of farming?” Paul said. “I think that it’s an opportunity for sure.”

    One such crop is guayule, a shrub that tire manufacturer Bridgestone has been paying some farmers to grow while researching the crop as a new source of natural rubber for tires. Thelander said he’s one of two growers in his area who are experimenting with guayule, which requires much less water than cotton or alfalfa.

    Dixon said he thinks there’s still a future for agriculture in Arizona if farmers make water-saving changes, like switching to drip irrigation, planting less water-intensive crops and improving management of watersheds. Dixon said he already has drip irrigation installed on some of his cotton fields, which he leases to another farmer, and plans to convert the remaining 120 acres to a drip system to save more water.

    A canal delivers water to Phoenix. Photo credit: Allen Best

    Cities face no cutbacks for now

    Under a shortage, Arizona faces the largest reductions of any state.

    Arizona gets about 36% of its water from the Colorado River, while other sources include groundwater and rivers such as the Salt and Verde. The state next year will lose 18% of its supplies from the Colorado River.

    Arizona’s plan for dealing with the shortages involves deliveries of “mitigation” water to help temporarily lessen the blow for some farmers and other entities, as well as payments for those that contribute water. The state and CAP officials approved more than $100 million for these payments, with much of the funds going to the Colorado River Indian Tribes and the Gila River Indian Community for water they contributed…

    The river’s shrinking flows have coincided with warnings from experts about insufficient water supplies for some of Arizona’s growing cities and suburbs.

    Porter and fellow ASU researcher Kathleen Ferris said in a recent report that Arizona doesn’t have adequate measures in place to sustain groundwater, and that the state’s existing laws have allowed for unsustainable over-pumping in many areas. They said state leaders should reform the groundwater rules to safeguard these finite water reserves.

    The state’s water agencies have for years been storing some imported Colorado River water in underground aquifers with the aim of using these reserves in the future when needed. The water has flowed into a network of basins, where the water has soaked down to recharge aquifers. The reductions in deliveries through the CAP Canal, however, have eliminated water that would have been available for replenishing groundwater…

    Managers of the Arizona Department of Water Resources have also sought to halt approvals for new development dependent on groundwater in Pinal County.

    In 2019, the agency’s officials said their data showed the county doesn’t have enough groundwater to provide for all of its planned subdivisions over the coming decades. And during a meeting this June, Deputy Director Clint Chandler laid out the agency’s position: “The days of utilizing native groundwater for development in Pinal are over. It’s done.”

    He said ADWR won’t approve new “assured water supply” applications for development reliant on groundwater in Pinal. Those who want to develop in Pinal, he said, “will need to bring their own, non-groundwater supplies.”

    In Pinal and other areas, new subdivisions have often been built on former agricultural land. Porter said farmers in Pinal have been “waking up to the fact” that if they heavily draw down the groundwater in the years to come, that could lead to long-term declines in the value of their land…

    A new approach to managing the river?

    The sorts of struggles that farmers are facing in Pinal could soon spread to other parts of the Southwest.

    Paul said dealing with the new reality on the Colorado River will require looking at a wide range of short-term and long-term approaches for adapting to less water, and also examining in detail how severe the shortages might become as negotiations move forward on plans for new rules after 2026…

    And while this summer’s monsoon rains have brought flooding and a burst of green vegetation in the Arizona desert, much of the Colorado River watershed remains in an extreme drought.

    To address the chronic water deficit on the Colorado River, managers of water agencies have been discussing a variety of other possible steps, such as investing in more wastewater recycling and desalination, and scaling up programs that pay farmers to temporarily leave some fields dry.

    But critics have argued that the Colorado River needs to be managed differently as climate change and drought take a worsening toll on the watershed…

    “You have this largest reservoir in the nation going empty. There is more water coming out than there is going in,” said J.B. Hamby, vice president of California’s Imperial Irrigation District, which holds the largest single water entitlement on the river.

    “Things like continued sprawl, demands for new sources of water being taken from this declining stream, which is the Colorado River, does not make sense when we’re dealing with what could be potentially catastrophic,” Hamby said.

    He said everyone needs to recognize the Colorado River is now in “an era of limits” that requires everyone along the river to understand that water use must be limited. He and others stressed that the water level at Lake Mead has been getting closer to 895 feet, a point called “dead pool” at which water would no longer pass at Hoover Dam.

    Graphic via the Arizona Department of Water Resources and the Central Arizona Project

    Here’s a release from the Arizona Department of Water Resources and the Central Arizona Project:

    The Colorado River Basin continues to experience drought and the impacts of hotter and drier conditions. Based on the Jan. 1 projected level of Lake Mead at 1,065.85 feet above sea level, the U.S. Secretary of the Interior has declared the first-ever Tier 1 shortage for Colorado River operations in 2022.

    This Tier 1 shortage will result in a substantial cut to Arizona’s share of the Colorado River – about 30% of Central Arizona Project’s normal supply; nearly 18% of Arizona’s total Colorado River supply; and less than 8% of Arizona’s total water use. Nearly all the reductions within Arizona will be borne by Central Arizona Project (CAP) water users. In 2022, reductions will be determined by Arizona’s priority system – the result will be less available Colorado River water for central Arizona agricultural users.

    While Arizona will take the required mandatory reductions under a Tier 1 shortage, the reductions to CAP water users will be partially mitigated by resources that have been set aside in advance for this purpose.

    “The 2019 Drought Contingency Plan put in place agreements and Arizona water users have taken collective action to mitigate reduced CAP water for affected municipalities, tribes and CAP agriculture,” said Ted Cooke, general manager, Central Arizona Project. “These DCP near-term actions will provide relief from reductions that will occur in 2022 as a result of a Tier 1 shortage.”

    Given the recent intensification of the drought, deeper levels of shortage are likely in the next few years. As impacts of drought persist, additional reductions to CAP water users are likely to occur pursuant to the DCP. Such reductions would include impacts to CAP water currently available to some central Arizona municipalities and tribes.

    The near-record low runoff in the Colorado River in 2021 significantly reduced storage in Lake Powell. The reduction in storage, combined with projections for future months, has triggered provisions of the 2019 Drought Contingency Plan designed to protect critical elevations in Lake Powell and Lake Mead through additional collective actions.

    “ADWR and CAP are working collaboratively with Arizona stakeholders and the Basin States to deploy more adaptive measures consistent with the Drought Contingency Plan and associated agreements,” said Tom Buschatzke, director, Arizona Department of Water Resources. “At the same time, ADWR and CAP will continue to work with partners within Arizona and across the Basin to develop and implement longer-term solutions to the shared risks we all face on the Colorado River now and into the future.”

    Buschatzke continued, “We in Arizona have acted and will continue to act to protect the water resources of our state and of the Colorado River system overall.”

    Check out ADWR & CAP’s Colorado River Shortage Fact Sheet

    The American West is drying up — The Economist #ColoradoRiver #COriver #aridification #ActOnClimate #KeepItInTheGround

    West Drought Monitor map August 10, 2021.

    From The Economist:

    The effects of climate change are being exacerbated by a century of bad policy

    There are two main reasons water shortages loom. The first is climate change. Both reservoirs straddle the Colorado River as it meanders from its headwaters in the Rocky Mountains down through the desert south-west to northern Mexico (see map). Warmer winters caused by rising greenhouse-gas emissions have diminished the snowpack that melts into the river each spring. In addition, parched soils have soaked up some of the runoff before it can reach Mead and Powell. Since 2000, when the so-called “Millennium Drought” began, the river’s annual flow has shrunk by nearly 20%. Multiple studies in the past five years have attributed up to half of that decline to human-caused climate change.

    Second, poor policy choices 100 years ago all but guaranteed that the water available to westerners could never meet expectations. After laws such as the Homestead Act encouraged white settlers to move West in the second half of the 19th century, the federal government financed the dams and pipelines needed for cities and agriculture to thrive in the desert. “By moving water around from more water-rich areas to water-poor areas, we sort of enabled these people to migrate and settle,” says Newsha Ajami of Stanford University. “Regardless of the fact that it’s dry, or it’s hot—if the water is flowing, you think anything is possible.”

    Boosterism for shiny new reclamation projects in the early 1900s led to dubious decision-making. The Colorado River Compact, which divvied up the river in 1922, used data from historically wet years to estimate the average annual flows. John Fleck, the director of water resources at the University of New Mexico, says a government scientist was ignored when he testified in the 1920s that the river could not meet its projected demands. The compact and its addendums, known as “the law of the river”, hold that the seven states and Mexico are to split 20.4bn cubic metres of water each year (or in American terms 16.5 million acre-foot of water, where an acre-foot is the amount of water it would take to submerge one acre of land one foot deep.) The river has not lived up to those aspirational figures, says Brad Udall, a climate scientist at Colorado State University. Between 1906 and 1999 annual flows averaged 15.2m acre-feet; since 2000 the river has mustered only 12.4m.

    Drought almost seems too puny a word to describe the water scarcity that the south-west is experiencing. “In some ways drought implies that it’s ephemeral,” says Kristen Averyt, Nevada’s climate policy coordinator. But the region’s future could be hotter and drier still, according to the most recent report from the Intergovernmental Panel on Climate Change. When discussing the outlook for Las Vegas, John Entsminger, who runs the Southern Nevada Water Authority (SNWA), prefers to talk in terms of aridification, or the long-term drying of the region. “I’m past talking about droughts,” he says.

    The region’s rich cities have been planning for this. Los Angeles, San Diego, Phoenix and Las Vegas all get water from the Colorado River—and all have diversified their water supplies. Investing in conservation, recycling programmes and desalination technology has allowed south-western metros to save water even while their populations have soared.

    Perhaps no place is more spooked by Lake Mead’s decline than the Las Vegas valley, which gets 90% of its water from the nearby reservoir. That dependence has spurred innovation. All water that goes down a drain is recycled, according to SNWA, and the city has ripped out grass in favour of desert landscaping. These measures, along with water restrictions and incentives, helped the valley cut its water use by 23% since 2002 while adding about 800,000 residents to its population. “People always assume that population growth and water consumption is more or less a one-to-one correlation,” says Mr Entsminger. But “you can add more people to the equation and simultaneously use less water.”

    A herd of elk could be seen roaming amid the irrigation sprinklers of Crystal River Ranch on Thursday. Ranch owner Sue Anschutz-Rodgers has told the state she is making progress toward building two dams and reservoirs on the property. Photo credit: Heather Sackett/Aspen Journalism

    But cities only account for a fraction of water use on the Colorado. Irrigated agriculture slurps up about 70% of the river each year. Cuts to the water supply may push farmers to grow different crops, fallow fields or return to pumping groundwater to get by. Pumping isn’t a sustainable option either. Years of overuse have depleted aquifers in parts of Arizona and California.

    Meanwhile, some demands on the river are growing. Thanks to generations of neglect, many Native American households do not have access to clean drinking water. Tribes also lack the plumbing needed to take the water they already have rights to. The bipartisan infrastructure bill that passed the Senate last week includes $6bn to help remedy that. As the river shrinks, will such attempts to right enduring wrongs go down the drain?

    Opinion: Yes, we’re facing a water shortage on the #ColoradoRiver. No, it’s not yet a crisis — AZCentral.com #COriver #aridification

    Lake Mead behind Hoover Dam. Lake Mead last month fell to its lowest level since the Hoover Dam was built in 1936. The shoreline has dropped 45 meters since the reservoir was last full in 2000. Photo by Ken Neubecker via American Rivers

    From AZCentral.com (Joanna Allhands):

    Opinion: A Tier 1 water shortage on Lake Mead might sound scary, but it’s not the problem we should be worrying about.

    There’s a lot of freaking out about the first Tier 1 water shortage at Lake Mead, which is expected to be announced on Aug. 16.

    There has been breathless coverage for weeks in the national press about how bad things are now for those of us who rely on the Colorado River.

    But that’s the thing. A Tier 1 shortage is far from a crisis.

    Pickepost Peak, Pinal County, Arizona. Photo credit: Matt Mets from Brooklyn, NY, USA – Uploaded by PDTillman, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=18072691

    Oh, this level of shortage will be painful, especially for farmers in Pinal County who are losing their only source of renewable water. They have no option other than to turn back to groundwater, which already has dwindled to the point that it cannot meet the long-term demands of all Pinal users. Some farmers are already beginning to make tough choices about which fields to fallow and which of their most productive lands are worth saving.

    But cities in metro Phoenix will not yet feel any ill effects of a Tier 1 shortage (and few will notice the impacts of a deeper Tier 2 shortage, a growing possibility for 2023). And those with the highest priority on-river water are even more insulated from pain, even if things get worse than that.

    A Tier 1 shortage isn’t our problem now

    Arizona has known for years that this day would come. We planned for it in a statewide implementation plan, which provides a complex web of temporary water supplies and compensation to help those who must shoulder these cuts. The plan gets progressively more painful, especially once we hit a Tier 3 shortage that will impact even the largest cities in metro Phoenix, but it’s all spelled out.

    Brad Udall: Here’s the latest version of my 4-Panel plot thru Water Year (Oct-Sep) of 2019 of the #coriver big reservoirs, natural flows, precipitation, and temperature. Data goes back or 1906 (or 1935 for reservoirs.) This updates previous work with @GreatLakesPeck

    If anything, the measured progression of cuts provides a bit of certainty in the chaos of the hotter, drier, more unpredictable future we face.

    So, while I know everyone will be talking about this first shortage because it’s new, and for those who haven’t been following the situation, reading the words “water shortage” will seem scary, forgive me if I view it as old hat.

    The Tier 1 declaration isn’t our problem. It’s the other numbers contained in the reports that also will be released on Aug. 16, which have turned grim with a speed that has surprised even the experts. The upstream Lake Powell is dropping quickly, thanks to already low lake levels and near-record low runoff this year. The lower Powell falls, the less water Lake Mead gets.

    That’s our problem.

    It’s likely that we are in for multiple years of 7.48 million acre-feet releases, down from the 8.23 million acre-feet (or more) releases on which we have come to rely. This is consequential, considering that until now we’ve only had one 7.48 million acre-feet release in 2014, when Lake Mead was nowhere near shortage levels.

    Lake levels never recovered from that lower release.

    Less water from Lake Powell is driving the tank

    And now Mead, which is V-shaped, is significantly lower in elevation – meaning it takes progressively less water to lower lake levels. Multiple years of 7.48 million acre-feet releases will cause lake levels to plummet (the forecast already says two in a row are likely, and that there’s a decent chance of them continuing through 2025).

    In fact, the latest modeling suggests there may be nearly a 40% chance of Lake Mead reaching a Tier 3 shortage – the most severe for which we have planned – by 2025.

    And if the projections hold, the states that rely on Mead could be meeting as soon as November to decide what other actions we can take (likely, it’ll be even more cuts) to keep the lake from falling below a critically low level of 1,020 feet of elevation. The modeling suggests that if we do nothing additional, the lake could drop to near 1,000 feet in a worst case by 2025.

    Consider that. Arizona could take its worst-case 720,000 acre-feet of cuts in a Tier 3 shortage and still the lake could tank.

    We must conserve – and by “we,” I don’t just mean Arizona. Demand certainly drives part of the equation for why Mead is dropping, which means we all need to use less. Permanently.

    But so does supply, and if the lake could get 750,000 acre-feet less than usual for several years – or maybe from here on out, in an effort to keep Lake Powell from tanking – this can’t just fall on Arizona’s shoulders, even if we are the state with the junior-most water rights.

    Whatever we do, it must be a shared sacrifice

    The good news is that other basin states seem to recognize this, that if the lakes have any hope at sustainability, it’s going to require an additional shared sacrifice to get them there.

    What that sacrifice looks like is anyone’s guess. Everyone knows it will be painful, which also will make it hard for everyone to swallow. The name of the game will be to choose actions that everyone can live with, not one that everyone likes.

    Because we’ve entered a new era of shortage. This is our reality, our new normal – and, in fact, it probably won’t be long before we consider a Tier 1 shortage as a time of excess.

    It can and probably will get worse from here, and yes, we’re planning for that, too. So that when that day arrives, we can say we’ve got this.

    It’s going to hurt. But there is no need to freak out.

    Reach Allhands at joanna.allhands@arizonarepublic.com. On Twitter: @joannaallhands.

    Map of the Colorado River drainage basin, created using USGS data. By Shannon1 – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=65868008

    Reclamation to address 2022 operating conditions for #LakePowell and #LakeMead during virtual press event

    As #LakePowell woes worry West, experts call for yet more reduced use — The #Montrose Daily Press #aridification #ColoradoRiver #COriver

    A longer walk from the dock to the water is in store for boaters at the Elk Creek marina, Blue Mesa Reservoir. Blue Mesa is being drawn down to feed critically low Lake Powell, as continued dry weather and rising demand deplete the Colorado River.
    (Courtesy photo/National Park Service) via the Montrose Daily Press

    From The Montrose Daily Press (Katharhynn Heidelberg):

    “The inescapable truth is that the Colorado River system is seeing declining flows and for the foreseeable future, is likely to continue on that trend. So we have to adjust expectations and water use accordingly,” [Andy Mueller] said…

    Year after year of dry conditions hammered the river and, this year, dropped Powell so low that Blue Mesa Reservoir and others in the Upper Basin had to release water to keep Powell’s power turbines turning.

    “It’s our water balance. Last year and this year have been terrible,” said Anne Castle, former assistant Secretary of the Interior for Water and Science during the Obama Administration, during an Aug. 5 webinar hosted by the Colorado River District. Castle is currently senior fellow at the Getches-Wilkinson Center for Natural Resources, Energy and the Environment at the University of Colorado law School…

    Given climate science predictions, the poor water years have not been a surprise, she said — but Powell dropped 50 feet last year, equating to 4 million acre feet of water no longer available. The reservoir is projected to drop within six months to the dreaded 3,525 feet elevation, the baseline for power generation and meeting the river compact requirements…

    On top of it, the compact prohibits the Upper Basin from depleting more than 75 million acre feet over 10 years (so that it can deliver an average of 7.5 million acre feet a year to the Lower Basin)— a “guarantee,” as far as the Lower Basin sees things, while the Upper Basin’s perception is Lower Basin states are vastly overusing their water.

    Under that rolling 10-year average, the Upper Basin has delivered 92 million acre feet, which is well above its obligation, but that is projected to drop to 82 million over 10 years and, if poor hydrology continues, could plunge even further, which stands to put the Upper Basin below its obligations…

    Lake Powell not only provides a “savings account” to meet the Upper Basin’s compact obligations, but generates hydropower that is used throughout the basin, [Steve] Wolff said.

    That hydropower in turn generates revenue, which flows back to the Upper Basin for infrastructure, Endangered Species Act compliance programs and salinity control…

    Changing the rules will have ripple effects on both users and the economy, she said. Although the Upper Basin sees overuse by the Lower, the Lower Basin says it has cut use; is doing what the compact allows, and that the Upper does not have a plan for demand management, [Castle] also said.

    “Everyone’s got their grievances and their legal theories. … There’s not enough water for any of the lawyers to be right 100%,” Castle said.

    The task is to equitably manage use — and that means reducing it, she said.

    Powell is sitting at 32% full and Mead, at 35% full, Mueller said…

    The Colorado River Compact accords to the Lower Basin an additional 1 million acre feet. The Upper Basin’s argument is that this is supposed to account for use from the Gila River, a tributary. The 1.5 million acre feet to Mexico under treaty is to be provided from surplus, unless there is a shortage on the river.

    What constitutes a shortage is a point of contention between Upper and Lower Basin states, but Mueller said it’s the Upper Basin’s position that the Lower Basin is undercounting its consumptive use.

    The Upper Basin uses 4 million to 4.5 million acre feet per year, well below its allocation, while the Lower Basin and Mexico (most years) use their full allotments.

    The Lower Basin has use of 2 million to 2.5 million acre feet in tributaries and loses another 1 million to 1.3 million acre feet in federal reservoir evaporation or loss during transit.

    Mueller said that evap is not accounted for in the Lower Basin’s consumptive use, which even without it is at 7.5 million acre feet. Evaporation from the Upper Basin’s reservoirs, including Blue Mesa, is counted as consumptive use, and the Upper Basin is still only using 4.5 million acre feet of its allocation, Mueller said…

    Through reservoir evap, transit losses, system losses, Lower Basin tributary consumption (excluding Mexico deliveries), species conservation and purported inefficiencies having to do the groundwater storage in Arizona, more than 1.1 to 1.3 million acre feet a year is being lost. Taking the low end of those estimates, over 10 years, more than 11 million acre feet of water would be available in the system had the overuse been addressed, Mueller said…

    Climate change and rising temperatures concern everyone in the Southwest, [Mueller] also said.

    “It’s not a political statement from me. It’s a fact we’re seen that temperature increase,” Mueller said Aug. 5, referring to data between 1895 – 2018.

    For every 1 degree rise in temperature, streamflow in the Colorado River system decreases 3 to 8%, he said, citing U.S. Geological Survey data.

    “The bottom line is, we have seen and should expect to continue to see decreasing flows in a system that is already stressed,” Mueller said…

    For the Upper Basin, such parched conditions in areas that don’t operate below large federal reservoirs mean a cut in consumptive use — or even near-cessation. Upper sub-basin ranchers and farmers on direct flow ditches don’t have water…

    The Uncompahgre and Grand Valley systems do have some reservoir storage above them and can continue to produce…

    Farmers and ranchers have been feeling the pinch for the past two decades. They cull herds because there is insufficient water for cattle and/or to grow their feed.

    Brad Udall: Here’s the latest version of my 4-Panel plot thru Water Year (Oct-Sep) of 2019 of the #coriver big reservoirs, natural flows, precipitation, and temperature. Data goes back or 1906 (or 1935 for reservoirs.) This updates previous work with @GreatLakesPeck

    Paper: Sources of Controversy in the Law of the #ColoradoRiver: An Upper Basin View — Lawrence J. MacDonnell #COriver #aridification

    Colorado River “Beginnings”. Photo: Brent Gardner-Smith/Aspen Journalism

    Click here to read the paper. Here’s the introduction and summary:

    Introduction

    The first two decades of the 21st Century have been characterized by prolonged periods of drought in the Colorado River Basin, causing some to argue that the region’s hydrologic system has shifted into long-term aridification. One effect has been to highlight the disparity between the amounts of water allocated for use under various legal arrangements and the physical availability of water, even in a system with over sixty million acre-feet (maf) of storage. This prolonged and deepening shortage of water also highlights other disagreements in the legal framework governing uses of the system’s total water supply. Serious disagreements respecting key provisions of the Law of the River were largely avoided when the system contained enough water to satisfy all interests. That is no longer the case. The purpose of this working paper is to explore some of the uncertainties in the Law of the River most likely to cause conflicts in times of water shortage and to consider ways for their resolution. The paper concludes that some long-standing assumptions about aspects of the Law of the River must give way to the realities of growing water scarcity. The paper begins with a brief summary of the conclusions from each of the six areas of uncertainty.

    Summary

    1. Uncertainties Concerning Mainstream Water Use Entitlements in the Lower Basin Interpretation: Consumptive uses of water from the main Colorado River for the three mainstream states are not a fixed allocation but aspirational and adjustable according to water availability after accounting for water for Mexico and losses and need to be adjusted accordingly.

    2. Uncertainties Respecting Uses of Water from Lower Basin Tributaries Interpretation: All beneficial consumptive uses of tributary water in the Lower Basin are included within the Articles III (a) and (b) apportionment and need to be fully identified and accounted for annually. The effect of these uses on water availability in the main Colorado must be taken into account. Uses exceeding 8.5 maf/year may constitute a violation of the Law of the River under certain circumstances such as if their existence causes a failure to meet treaty obligations with Mexico.

    3. Uncertainties Respecting the Status of Article III (b) Water
    Interpretation: Authorization for the Lower Basin to increase its consumptive uses an additional one million acre-feet (maf) resulted in an agreement limiting the Lower Basin to total protected consumptive uses of 8.5 maf/year, including those in the tributaries. Uses exceeding 8.5 maf are contingent and need to be identified and managed, if necessary.

    4. Uncertainties Respecting the Meaning of Article III (d) in an Era of Climate Change- Induced Water Shortages
    Interpretation: The Upper Basin’s obligation not to deplete flows at Lee Ferry below 75 maf over consecutive ten-year periods (75/10) must take into account climate-change-induced reductions in water availability unrelated to Upper Basin depletions and find more flexible ways to satisfy this obligation that reflect actual water availability.

    5. Uncertainties Respecting the Sources of Water to Satisfy the Mexico Treaty Obligation
    Interpretation: The traditional view that the Upper Basin has an obligation to provide 750,000 acre-feet per year to meet the Treaty obligation to Mexico needs to be reconsidered when Lower Basin uses exceed 8.5 maf/year, when Mexico adjusts its delivery requirements to reflect shortages, and in view of the fact that, in some manner, the treaty water is a national obligation.

    6. Uncertainties Respecting Uses of Tribal Water Rights, including Existing but Unquantified Rights
    Interpretation: Tribes with reservations in the basin have rights to more than 20% of the system’s water. The states and the United States should search out opportunities to enter into voluntary, compensated agreements with willing tribes to forego uses of portions of their water rights as needed to help maintain and increase system water.

    John Fleck takes a look at the uncertainties in this post on Inkstain, “Sources of Controversy in the Law of the River – Larry MacDonnell.”:

    As we lumber toward a renegotiation of the operating rules on the Colorado River, one of the challenges folks in basin management face is the differing understandings of the Law of the River. There’s stuff we all know, or think we know, or stuff Lower Basin folks think they know that Upper Basin people may disagree with, and stuff Upper Basin folks think they know that Lower Basin people may disagree with.

    Larry MacDonnell, one of the Law of the River’s great legal minds, has written a terrific treatise to help us untangle this. It’s clearly written from an Upper Basin perspective (“Yay!” said the guy – me – who drinks Upper Basin water!), so Lower Basin folks may disagree with some of what Larry is saying. That’s OK, the important thing is to understand that the answers to these questions are not given – that there are genuine disagreements on this stuff, and the negotiations to come need to wrestle with these questions.

    A “gut punch” as water rushes from #FlamingGorge to save #LakePowell’s hydropower system — @WaterEdCO #ColoradoRiver #COriver #aridification

    Boaters at Cedar Springs Marina on Flaming Gorge Reservoir. The reservoir’s levels are expected to drop 2 feet a month under an emergency release of water designed to keep Lake Powell’s hydropower system operating. July 22, 2021 Credit: Jerd Smith

    From Water Education Colorado (Jerd Smith):

    John Rauch and his family have operated the Cedar Springs Marina here since 1986. But three weeks ago, when the federal government suddenly ordered millions of gallons of water to be released from Flaming Gorge Reservoir down the Green River to Lake Powell, Rauch wasn’t prepared.

    “It was a total gut punch,” he said on a recent hot, sunny morning. As visitors trekked down to rent his pontoon boats, and others slid their fishing craft into the reservoir, Rauch and his employees were already planning which boat docks and ramps would have to be relocated to keep them afloat. The reservoir is projected to drop as much as 2 feet a month through the fall as water is released.

    Drought has plagued the Colorado River Basin for 20 years, but it hit crisis proportions this summer, pushing lakes Powell and Mead to historic lows and triggering, for the first time, emergency releases of water from Utah’s Flaming Gorge, Colorado’s Blue Mesa, and New Mexico’s Navajo reservoirs.

    All told, 181,000 acre-feet of water are to be sent to Lake Powell by the end of December. Powell has dropped so low that its hydropower plants, which supply millions of homes with electricity and generate revenue for such things as a critical Colorado River endangered species program, may stop operating as early as next year if water levels continue to drop as they have been. The U.S. Bureau of Reclamation estimates there is a 3 percent chance of this occurring next year and a 29 percent chance of this occurring in 2022. But given the speed of the Powell’s decline, no one wants to risk a hydropower shutdown.

    Savings accounts

    Since their construction in the 1960s these reservoirs, known as Reclamation’s Colorado River Storage Project reservoirs, have acted as a giant savings account, helping ensure that if a crisis erupted on the river, the Upper Colorado River Basin states of Colorado, Wyoming, Utah and New Mexico would have enough water on hand to fulfill their legal obligation to deliver water to Nevada, Arizona and California, known as the Lower Basin states.

    Credit: Chas Chamberlin

    Colorado’s Blue Mesa Reservoir, part of the Aspinall Unit, is already low, at just 43 percent of capacity as of last month. Fed by the Gunnison River, a major tributary of the Colorado, the reservoir is tourism hot spot on Colorado’s West Slope.

    Kathleen Curry, a former Colorado lawmaker, sits on the Colorado River District Board. She said she understands the need for the releases, but she said the changes in the shoreline at Blue Mesa aren’t going unnoticed.

    “It’s taking residents and visitors by surprise, just because I don’t think anyone was expecting it,” she said.

    The releases come under a special Upper Basin Drought Contingency Plan approved by Colorado, Wyoming, Utah and New Mexico in late 2018. A similar drought plan is in place for the Lower Basin, and they have been cutting back withdrawals from Lake Mead for the past two years.

    Still the river system is drying out. And water leaders in Colorado are deeply worried that their carefully protected savings account is going to dry up too quickly to solve the Colorado River’s long-term problems.

    Will it work?

    “I understand and support the necessity of the Secretary [of the Interior] taking this action,” said Jim Lochhead, CEO of Denver Water. “The major concern I have is that Reclamation says the 181,000 acre-foot release will raise Lake Powell three feet. But I don’t know that they can even show that. I don’t know that they have accounted for transit losses and other losses.

    “It’s important when these releases are made that they are accounted for, that we know where this water is going. If it doesn’t actually get down to [Lake Powell] to accomplish what it was designed to do, we should have kept it in that savings account,” Lochhead said.

    Becki Bryant, a spokesperson for the U.S. Bureau of Reclamation’s Upper Colorado River region, said the agency is working to create a hydropower buffer in Lake Powell and believes the releases are adequate to accomplish that. But Reclamation is not yet doing the kind of precise tracking and accounting known as water “shepherding,” to ensure flows make it downstream, that Lochhead is requesting.

    On Aug. 1, Lake Powell’s elevation stood at 3,553.8 feet above sea level. The action point, or so-called target elevation is 3,525. When that point came close in July, Reclamation moved quickly to order the emergency releases.

    Powell’s hydropower plant stops generating power when it drops to 3,490 feet in elevation, according to Reclamation.

    “Reclamation expects the additional release of water will be sufficient to protect Lake Powell’s target elevation through 2021. That target elevation provides a 35-vertical-foot buffer designed to minimize the risk of dropping below the minimum power pool elevation of 3,490 feet, and balances the need to protect the infrastructure at Powell’s Glen Canyon Dam.

    “Shepherding water would be beneficial but is challenging on many levels for Colorado River Basin states,” said Bryant via email.

    Bleak forecasts

    Bryant said Reclamation will continue to consult with the Upper Basin states as it monitors reservoir levels and weather forecasts. Should conditions deteriorate further, the agency could examine whether to declare the releases futile and stop them, as it is allowed to do under the 2018 Drought Contingency Plan.

    The water being released is so-called “system water,” meaning that it isn’t owned by a particular user.

    Held by the federal government for the benefit of the Upper Basin states, the amounts of water specified in the release plan are jaw-dropping: 125,000 acre-feet from Flaming Gorge; 36,000 acre-feet from Blue Mesa; and 20,000 acre-feet from Navajo. An acre-foot of water is enough to cover one acre of land to a depth of 12 inches.

    If that same amount of water were going to cities, it would be enough to serve more than 362,000 homes for one to two years. If going to farms, it could irrigate more than 113,000 acres, depending on the crop.

    If the historic, 20-plus-year drought cycle doesn’t end soon, refilling those reservoirs is going to be difficult. And that has water managers worried.

    “My level of concern is quite high,” said Becky Mitchell, director of the Colorado Water Conservation Board, the state’s lead water planning and policy agency. She also sits on the four-state Upper Colorado River Basin Commission, which advises Reclamation on river issues.

    “And I can’t tell yet if [the releases] are going to do the trick,” she said. “But we have to respond to the levels in Powell.”

    Cedar Springs Marina near Dutch John, Utah, on Flaming Gorge Reservoir in the early 1960s. In a first, emergency releases are being made under the 2018 Upper Colorado River Basin Drought Contingency Plan. Photo courtesy of the Rauch family.

    Legal reckoning?

    Under the 1922 Colorado River Compact, Colorado and the other Upper Basin states must deliver 7.5 million acre-feet (maf) [per year, 75 maf per 10 years] of water to the Lower Basin on a 10-year running average. Right now, the Upper Basin is delivering roughly 9.2 maf, Mitchell said, meaning that there is still time to help the system come back into balance before the Lower Basin states could legally call for more water than they currently receive.

    Lake Powell is the Upper Basin’s largest storage pool on the system and is designed to be the four Upper Basin states’ major source of protection. Because of their legal obligations, Colorado water users are closely monitoring this year’s plunge in Powell, with the threat to hydropower production being seen as a dangerous antecedent to a compact call.

    “That the system continues to deteriorate is concerning,” Lochhead said.

    Roughly half of Denver Water’s supplies are derived from water rights it owns on the Colorado River system. While one portion of its portfolio dates back to 1921, and would therefore trump a 1922 compact call, several other rights were established later, meaning the utility might have to stop pulling from those water sources if Colorado were forced to cut back in order to meet compact obligations.

    Other Front Range water providers, who also have Colorado River rights, are even more vulnerable, including the Pueblo-based Southeastern Colorado Water Conservancy District.

    Southeastern’s rights date only to 1957.

    Contingency v. reality

    Lee Miller, Southeastern’s attorney, said the Colorado River crisis remains a long-term problem for his agency.

    The rapid deterioration this year, however, is prompting everyone to rethink how much time they have to balance the massive river system as drought and a warming climate, as well as population growth, continue to sap its flows.

    “Both the Upper and Lower Basin have now had to initiate elements of their drought contingency plans. When we passed it a couple of years ago everyone thought, “It’s good to have a contingency plan.’ But I don’t think anyone thought we would have to use the plans this quickly. It’s gone from being a contingency to being a reality, and that’s concerning.”

    Back up at Flaming Gorge, John Rauch is watching the levels drop and making his own contingency plans.

    “We are planning for the worst,” Rauch said. “For the foreseeable future, the outlook is dry. If it ends up that by the end of all of this that the reservoir becomes a river channel, we will be down there at water’s edge selling worms.”

    Jerd Smith is editor of Fresh Water News. She can be reached at 720-398-6474, via email at jerd@wateredco.org or @jerd_smith.

    #Wyoming looks to store, divert more #water as #LakePowell dries up — Wyofile.com #GreenRiver #ColoradoRiver #COriver #aridification

    Lake Powell is seen in a November 2019 aerial photo from the nonprofit EcoFlight. Keeping enough water in the reservoir to support downstream users in Arizona, Nevada and California is complicated by climate change, as well as projections that the upper basin states of Colorado, Utah, Wyoming and New Mexico will use as much as 40% more water than current demand. A recent white paper from a lineup of river experts calls those use projections into question.
    CREDIT: ECOFLIGHT via Aspen Journalism

    From Wyofile.com (Angus M. Thuermer Jr.):

    As Lake Powell dropped to its lowest-ever level [July 23, 2021] — a decline that has forced dam tenders to unexpectedly release 125,000 acre-feet of water from Flaming Gorge Reservoir — Wyoming stood behind five projects that could divert tens of thousands more acre-feet from waterways in the troubled Colorado River Basin.

    Powell’s surface elevation dipped to 3,555.09, lower by 12 hundredths of an inch than the previous post-completion nadir of April 8, 2005. The new benchmark is “probably worth noting,” Wayne Pullan, the U.S. Bureau of Reclamation’s Region 7 director, said in a press call [July 27, 2021].

    “The fact that we’ve reached this new record underscores the difficult situation that we’re in,” he said…

    Friday’s mark amounts to a 150-foot drop in the storied Utah-Arizona reservoir over 24 years, a decline that’s spurred action to preserve irrigation flows, millions of dollars in hydropower revenue and myriad necessities for 40 million people in the West.

    As the BOR began its “emergency” release of 125,000 acre-feet from Flaming Gorge Reservoir on July 15, a coalition of downstream water users called for a moratorium on new dams and pipelines…

    In an era of drought, aridification and climate change, new water projects will be closely scrutinized, Pullan said…

    Meantime Gov. Mark Gordon announced he will appoint a drought working group to ensure “local perspectives on issues that impact our water users and the State” are heard when planning for a crisis that “may last for years.”

    Wyoming will not be deterred from its water development goals that would store, divert or otherwise use another 115,000 acre-feet in the upper reaches of the 246,000-square-mile Colorado River system, top officials told WyoFile.

    “A pure, strict moratorium flies in the face of rights held by all seven [Colorado River Compact] states,” said Pat Tyrrell, Wyoming’s member on the Upper Colorado River Commission. “I would have a hard time recommending that Wyoming get itself in that position.”

    The Bureau of Reclamation has a limited say in what Wyoming can do with its water and development, state Senior Assistant Attorney General Chris Brown said.

    “They certainly don’t get to say ‘no,’” he said. “They certainly don’t have that authority in Wyoming to decide how Wyoming wants to develop its water.”

    #LakePowell — Nation’s Second-Largest Reservoir — Hits Record Low — KUNC #ColoradoRiver #COriver #aridification

    Lake Powell is shown here, in its reach between where the Escalante and San Juan rivers enter the reservoir, in an October 2018 aerial photo from the nonprofit environmental group EcoFlight. Colorado water managers are considering the implications of a program known as demand management that would pay irrigators on a temporary and voluntary basis to take less water from streams in order to boost water levels in Lake Powell, as an insurance policy against compact curtailment.
    CREDIT: ECOFLIGHT

    From KUNC (Luke Runyon):

    The nation’s second-largest reservoir, Lake Powell, is now at its lowest point since it filled in the 1960s.

    The massive reservoir on the Colorado River hit a new historic low on July 24, dropping below 3,555.1 feet in elevation. The previous low was set in 2005. The last time the reservoir was this low was in 1969, when it first filled. It’s currently at 33% of its capacity.

    The popular southwestern recreation hotspot on the Arizona-Utah border, which plays host to houseboats, kayaks and speedboats, has fluctuated over the past 21 years due to low river flows exacerbated by warming temperatures. About 4.4 million people visited Lake Powell in 2019, and spent $427 million in nearby communities, according to the National Park Service.

    Lake Powell is now at its lowest point since it first filled in the late 1960s. Credit: U.S. Bureau Of Reclamation

    Demand across the seven U.S. states and two Mexican states that rely on the river hasn’t declined fast enough to match the reduced supply, said Brad Udall, a climate scientist at Colorado State University…

    Forecasts for Lake Powell’s inflows from the Colorado River grew increasingly pessimistic during spring and early summer this year. Flows from April to July are projected to be 25% of the long term average, placing 2021 into the top three driest on record for the watershed.

    “The hard lesson we’re learning about climate change is that it’s not a gradual, slow descent to a new state of affairs,” Udall said…

    Emergency water releases from smaller reservoirs upstream of Powell will take place over the next six months. They’re meant to maintain hydropower production at Powell’s Glen Canyon Dam.

    “I’m very alarmed,” said Tanya Trujillo, assistant secretary for water and science at the U.S. Interior Department. “It’s not only focused on hydropower concerns, we’re concerned operationally in general. We’re acting in coordination with the states about these decisions.”

    Lake Mead, the nation’s largest reservoir, also on the Colorado River, is at a record low. Both Powell and Mead are projected to decline further this year…

    The river’s current managing guidelines are set to expire in 2026. An update to those guidelines passed in 2019 included a potential demand management program in the river’s Upper Basin states of Colorado, Wyoming, Utah and New Mexico. In its conceptual form, the program would pay water users to voluntarily forgo water deliveries in exchange for payment. The saved water could be banked in Lake Powell to buffer against a potential Colorado River Compact call from downstream states.

    None of the Upper Basin states has committed to fully implementing a plan to rein in demands on the river’s water in order to fill Lake Powell with conserved water. The plan remains in an investigatory phase.

    Brad Udall: Here’s the latest version of my 4-Panel plot thru Water Year (Oct-Sep) of 2019 of the #coriver big reservoirs, natural flows, precipitation, and temperature. Data goes back or 1906 (or 1935 for reservoirs.) This updates previous work with @GreatLakesPeck

    Opinion: Will the #Drought Contingency Plan be enough to save #LakeMead? Maybe – for now — AZCentral.com #ColoradoRiver #COriver #aridification #DCP

    The rising sun illuminates the desert landscape near Channel Island at the head of Virgin Canyon in Lake Mead in the Lake Mead National Recreation Area on the Arizona-Nevada border (Photo from Arizona). Photo by Colleen Miniuk-Sperry via American Rivers

    Here’s a guest column from Bruce Babbit that’s running on AZCentral.com:

    It’s too soon to tinker with key parts of the Colorado River Compact. For now, our best bet may be to temporarily extend the Drought Contingency Plan.

    Lake Mead is disappearing. It has already fallen more than 146 feet since 2000.

    Last week the Bureau of Reclamation forecast that it will likely drop another 42 feet in the next five years, drawing the lake surface down to a level barely sufficient to generate power and release water for downstream water users in California and Arizona.

    To manage this decline and stabilize the lake is not rocket science. Cities and farms are simply taking more water out of Lake Mead than is coming in from the Colorado River. The lake is like a bank account: on average, you can only take out as much as is being deposited by the Colorado River.

    We’ll need all of DCP’s cuts to stabilize Lake Mead

    When the current drought began in 2000, the three Lower Basin states that take water from the lake (Arizona, California and Nevada) suddenly awakened to the problem. After several years of difficult negotiations, they agreed on a Drought Contingency Plan (DCP) that, with previously agreed cuts, would bring the lake into balance.

    Hoping the drought would lift before too long, the DCP negotiators agreed to spread the cuts over coming years in response to changing lake levels. However, as the drought continues and intensifies, the Drought Contingency Plan is looking more like a Drought Certainty Plan.

    It now appears that the full schedule of DCP reductions will be needed to bring the lake into balance at approximately 1,025 feet of elevation. The next reduction begins in 2022, a further cut is likely in 2023 with even deeper remaining cuts likely to occur by 2026, the year in which the current DCP will expire.

    By that time the states that share the Colorado River must reach a new agreement. Their first task will be to decide whether still more reductions beyond the present DCP will be necessary in a new “DCP Plus.” It will be a close call, for the existing DCP schedule may be enough to bring the lake into balance, albeit at a very low level.

    The negotiators will then face a newly emerging problem – the threat that the Colorado River might run so low, there will not be enough inflow to stabilize the lake, even with the full agenda of DCP reductions.

    It works if we keep getting the minimum flow

    So far Arizona and the Lower Basin states have managed through the drought by counting on a steady average minimum of at least 7.5 million acre feet of new water released annually from upstream reservoirs into Lake Mead. This minimum flow “guarantee” is contained in Article III(d) of the Colorado River Compact, the basic law governing the river.

    This combination of a guaranteed minimum inflow from upstream reservoirs, paired with scheduled DCP reductions, makes it possible to plan with some confidence for Central Arizona Project (CAP) deliveries.

    The Central Arizona Project aqueduct will not run dry and disappear alongside the ancient Hohokam canals. It will continue to deliver water up from the river to the Phoenix and Tucson areas.x

    As long as the scheduled DCP cuts are carried out, and as long as the minimum anticipated inflow guaranteed by Article III(d) remains in place, the CAP should deliver into the future an average of about 40% less than the delivery forecast in 2020.

    As its shoreline shrinks, Lake Mead will be a smaller lake, but it should hold steady at a level sufficient to generate power and deliver water through its outlets. And it will remain a beautiful and inviting National Recreation Area.

    A warming climate could upend the law of the river

    However, there is an elephant in the room. It is called human caused global warming.

    As the climate continues to warm, rising temperatures cause more of the runoff from rain and melting snow to both evaporate and soak into drying soils before reaching the Colorado River.

    Scientists predict that as the climate continues to warm, river flows could continue to decline by as much as 20% to 30% by 2050.

    If these predictions hold, there will come a point at which the guaranteed Article III(d) flows into Lake Mead could so severely limit water use in the Upper Basin states of Colorado, Utah, New Mexico and Wyoming that the entire law of the river, including the Colorado River Compact, will be up for discussion and reconsideration.

    We have not reached that point.

    More studies are necessary and the predictive power of science is still evolving. The natural drought cycle that exists apart from global warming may lift. The Upper Basin states have yet to curtail any of their water uses in order to send flows to the Lower Basin.

    For now, it might be smart to extend DCP

    It is, therefore, too soon to be tinkering with Article III(d) or other provisions of the Colorado River Compact.

    From the vantage point of today, the best alternative for a new agreement in 2026 will be to extend the existing DCP for another 10 years.

    The negotiators will surely need to make adjustments to the amount and timing of DCP reductions. And there is certainly some flexibility to simultaneously adjust the amount and timing of the Upper Basin’s releases to the Lower Basin.

    The Colorado River is a magnificent and wildly unpredictable resource. Managing it will always require our ongoing vigilance and commitment to working together to create fair and equitable outcomes.

    Bruce Babbitt is is a former Arizona governor and former U.S. Secretary of the Interior. Reach him at brucebabbitt2000@yahoo.com.

    Demand management discussions continue amid worsening #ColoradoRiver crisis — @AspenJournlism #COriver #aridification

    Lake Powell is shown here, in its reach between where the Escalante and San Juan rivers enter the reservoir, in an October 2018 aerial photo from the nonprofit environmental group EcoFlight. Colorado water managers are considering the implications of a program known as demand management that would pay irrigators on a temporary and voluntary basis to take less water from streams in order to boost water levels in Lake Powell, as an insurance policy against compact curtailment.
    CREDIT: ECOFLIGHT

    From Aspen Journalism (Heather Sackett):

    CWCB not yet ready to adopt next-steps timeline

    The crisis on the Colorado River is not waiting for the state of Colorado to develop a program to avoid water shortages.

    That was the message that Colorado Water Conservation Board members received from some commenters at their regular meeting Wednesday. The state water board is investigating the feasibility of a program known as demand management, which would pay irrigators on a temporary and voluntary basis to not irrigate and instead use that saved water to meet downstream obligations on the Colorado River.

    James Eklund, former head of the CWCB and one of the architects of the Drought Contingency Plan, which allows for the possibility of a demand-management program, urged the board in the public-comments portion of the discussion to take swift action on what he called arguably the largest water crisis Colorado has ever faced.

    “Time is not your or our collective out. If you wait, that’s a decision that you make to determine whether or not we have a hand on the steering wheel as we move forward with this river,” he said. “The waiting is, I think, folly.”

    In written comments, some environmental nonprofit organizations, including The Nature Conservancy, Theodore Roosevelt Conservation Partnership and Trout Unlimited, said they were in favor of a demand-management program and urged the state to move forward more quickly.

    The state received the comments in response to a draft framework released in March of what a demand-management program could look like, with three tiers of implementation options, guiding principles, threshold issues, trade-offs and equity considerations. The framework matrix is based on the findings of nine workgroups assigned to tackle different aspects and challenges of a potential program.

    In addition to written comments, Trout Unlimited Colorado Water Project’s director, Drew Peternell, also told board members at the meeting that the group has concluded that demand management should be one tool Colorado uses to avoid compact curtailment.

    “We realize you are taking on some very tough issues, but I also want to urge you to pick up the pace,” he said. “Hydrology on the West Slope is not good. Additional shortages on the system are likely. They would be painful. Now is the time to get something done.”

    Gail Schwartz, who represents the main stem of the Colorado River basin on the nine-member board, noted the gravity of the situation and invoked the warnings of 19th-century explorer and river runner John Wesley Powell, after whom the second-largest reservoir in the country and ground zero for many of the basin’s most pressing problems is named. In 1893, the prescient Powell said the American West was “piling up a heritage of conflict and litigation over water rights, for there is not sufficient water to supply these lands.”

    “I think that we are at this extraordinary moment in time,” Schwartz said. “This is a desert and we are going to empty every bucket, we are going to empty every river, and this is the inevitable unless we can develop the courage and the ability to step forward.”

    The controversial water-banking program, which some fear could harm agriculture on the Western Slope, has sparked a lot of discussion but little agreement over the past two years. Some have expressed frustration with what they say is the state’s slow pace of a program rollout and want to begin pilot projects to test the program’s feasibility. Mark Harris, general manager of the Grand Valley Water Users Association, urged the board in his comment letter to take aggressive action.

    “The only way to really raise the important questions and to identify the positive and negative consequences of our actions is to try something,” Harris said. “There is no other way to advance the agenda without taking some well-considered risk.”

    Water from the Government Highline Canal pours into Highline Lake in Mack. Water from the Government Highline Canal pours into Highline Lake in Mack. The Grand Valley Water Users Association – the group that regulates water flow in the canal – is calling for the state to take more aggressive steps to test out the concept of demand management.
    CREDIT: BETHANY BLITZ/ASPEN JOURNALISM

    Drought Contingency Plan

    Under the 2019 Drought Contingency Plan, signed by the seven Colorado River basin states, the Upper Basin (Colorado, Utah, New Mexico and Wyoming) can develop a program to send up to 500,000 acre-feet of saved water downstream to Lake Powell as a kind of insurance policy to bolster levels in the reservoir and help meet Colorado River Compact obligations. If the Upper Basin states were not able to deliver the 75 million acre-feet of water over 10 years to the Lower Basin (Nevada, Arizona and California), as required by the 1922 agreement, it could trigger what’s known as a compact call, which would force involuntary cutbacks in water use.

    Over the past two decades, climate change has been robbing the Colorado River system of flows, and levels in the river’s two largest reservoirs, Lake Powell and Lake Mead, have plummeted to record lows. Federal officials have begun making emergency releases from Upper Basin reservoirs to prop up levels in Lake Powell and preserve the ability to make hydroelectric power. But some water managers say unless this Upper Basin reservoir water is replenished with big snow next winter, the releases may be a one-time, stopgap solution.

    In addition to the urgency imposed by the worsening hydrology, the clock is ticking on the storage agreement laid out in the Drought Contingency Plan, which allows for the development of a demand-management program. It expires in 2026, when a new round of negotiations begins. All four Upper Basin states must agree to move forward with a demand-management program; Colorado cannot go it alone.

    The “bathtub ring” at Lake Powell evidences lower flows coming into the reservoir. Federal officials are making emergency releases from upper basin reservoirs to prop up levels and Lake Powell and preserve the ability to make hydroelectric power.
    CREDIT: BRENT GARDNER-SMITH/ASPEN JOURNALISM

    Decision making roadmap

    Despite the sense of urgency expressed by some members, the CWCB did not approve the next step forward that was recommended by staff: adopting a decision making roadmap, which sets out a timeline for determining if demand management is achievable and worthwhile for Colorado. Tackling whether demand management is achievable was set to tentatively begin in September, and looking into whether the program is worthwhile for Colorado was supposed to begin in November.

    Schwartz made a motion to adopt the roadmap but later withdrew it after some board members said it was too broad, left too many questions unanswered and did not incorporate feedback from the board.

    “I feel this roadmap is incomplete, and until I see the roadmap with the comments from the board, I don’t feel comfortable moving forward,” said Jackie Brown, who represents the Yampa and White river basins.

    This field in lower Woody Creek is irrigated with water that eventually flows into the Colorado River. The state of Colorado is exploring how to fund a program that would pay irrigators to reduce their consumptive use in order to send water downstream to a savings account in Lake Powell.
    CREDIT: BRENT GARDNER-SMITH/ASPEN JOURNALISM

    River District’s interests

    Demand management was also a topic at the Colorado River Water Conservation District’s quarterly board meeting in Glenwood Springs on Tuesday. Amy Ostdiek, the CWCB’s deputy section chief for interstate, federal and water information gave a presentation on the state’s progress.

    The River District, which represents 15 counties and advocates to keep water on the Western Slope, is conducting its own investigation into the feasibility of demand management through meetings with water users and plans to release a report of its findings. The River District has not yet taken a position on the potential program.

    “My personal view is that we are going to keep pushing to protect the River District’s interests in a demand-management program, but we realize this is something necessary to move forward sooner rather than later,” said Peter Fleming, River District general counsel.

    Board president Marti Whitmore, who represents Ouray County, asked staff to come up with a proposal with specifics on a demand-management program.

    “The time is right to come up with something to put on the table for discussion purposes,” she said. “I’m just looking to break the logjam here, so we are talking some substance instead of just frameworks and process. It could be an opportunity for the River District to provide some leadership.”

    CWCB board members plan to continue discussing demand management at an Aug. 18 workshop.

    Aspen Journalism covers water and rivers in collaboration with The Aspen Times. For more, go to http://www.aspenjournalism.org.

    The Entire #ColoradoRiver Basin is in Crisis — Audubon #COriver #aridification

    Western Grebe with chick. Photo: Krisztina Scheeff/Audubon Photography Awards

    From Audubon (Karyn Stockdale):

    The U.S. Bureau of Reclamation (Reclamation) recently shared alarming news about the unprecedented conditions on the Colorado River and I’ll attempt to explain their complicated projections. Reclamation, the agency that oversees federal water management across 17 western states, publishes some pretty wonky information, even to those of us who regularly interface with this agency and rely on its analyses.

    Just last month, in June, Reclamation shared their new 5-year projections for the Colorado River Basin to further assist drought management within the Basin. They share these projections a few times every year. The big news is that the water situation on the Colorado River is worse than folks anticipated when adopting the shared shortage agreements called the Colorado River Drought Contingency Plans (DCPs) adopted in 2019.

    To jump to the conclusion: Reclamation’s projections signal that we urgently need to do more than the DCPs envisioned because of the increasingly hot and dry conditions in the basin. Reclamation has continued to revise their projections throughout this shockingly dry spring, resulting in really dire projections for water storage and distribution. In other words, less water for people, and less water in streams that benefit birds, fish, and a robust recreational economy.

    We’ve arrived at the time when the limits of the Colorado River are being reached.

    What does this mean for birds? Birds rely on the riparian habitats of the Colorado River and its tributaries and aquatic birds have come to rely on the big reservoirs on the river too. Surveys of aquatic birds at Lake Powell have documented dabbling ducks, diving species, shorebirds, and more. American Coot and Western Grebe are common. Gadwall, Common Goldeneye, Redhead, and Green-winged Teal have also been observed. The habitats created by Lake Powell have existed for less than 60 years and can change with the lake level, which can affect birds.

    You may recall that the main reservoirs on the highly-plumbed Colorado River—Lake Powell and Lake Mead—sometimes “equalize” in water accounting flows. Lake Powell is the receiving reservoir from the Upper Basin states (Wyoming, Colorado, Utah, and New Mexico) meaning that it stores water that runs downstream from these states. Lake Mead is the distributing reservoir for the Lower Basin states (Arizona, Nevada, and California) and Mexico meaning that water deliveries to each of these places comes from available water in this lake (and legal water rights, of course). The amount of water in Lake Mead—the largest reservoir in the country—determines how much water a state has available for their Colorado River water users.

    Reclamation projects that Lake Mead water levels are, for the first time ever, so low that they will require cuts in water Lower Basin water deliveries, operating in Tier 1 shortage. And they say there is a greater than 99% chance of this shortage in 2022 and a high risk (greater than 80% probability) that Lake Mead will remain under shortage operations for at least the next five years, perhaps with even more aggressive cuts.

    Severe drought conditions are also triggering emergency response (outlined in the Upper Basin Drought Response Operations Agreement as part of the DCP here on page 7) whereby Reclamation will release water from reservoirs further upstream to address declining water levels at Lake Powell and protect the ability of the Glen Canyon Dam to generate hydropower. Representatives from Reclamation and the Upper Basin states just announced they will release water from Flaming Gorge and other reservoirs.

    If we have another bad water year, elevations at Lake Mead could even be lower than before Lake Powell was created. It’s getting to the bottom for both of these reservoirs.

    Why does this matter? These unprecedented and exceptional drought conditions are a signal to all of us to take steps to ensure the river flows long into the future and address water security for people and wildlife. The entire Colorado River Basin is in crisis.

    Climate change is here. We have a very limited window to begin implementing innovative tools that are at our disposal in order to adapt to and mitigate climate change. In addition to reductions in carbon emissions and other large-scale solutions for our planet, Audubon continues to focus on federal and state investments in climate resilient strategies that will help stabilize water supplies and better assist economic sectors and ecosystems adapt to changing conditions. Future water projections by Reclamation – and future agreements on the Colorado River – need to account for climate extremes.

    The effects of prolonged drought and climate change affect everyone in the basin. Our way of life is at stake—millions of acres of farmland and ranches, urban and rural communities, recreation on rivers and lakes, our economies, as well as incredible bird life. Our work is more urgent and more difficult. Please join us in advocating for climate solutions that benefit the Colorado River and other important rivers in the West. Sign up for updates here.

    A Massive Plumbing System Moves #Water Across #Colorado’s Mountains. But This Year, There’s Less To Go Around — KUNC

    The Lost Man diversion canal, about to duck under SH 82 above Aspen, in the Roaring Fork River watershed. Photo: Brent Gardner-Smith/Aspen Journalism

    From Aspen Public Radio (Alex Hager) via KUNC:

    High up on Colorado’s Independence Pass, a narrow, winding road weaves through the evergreens and across mountain streams, up and over the Continental Divide at more than 10,000 feet. At one point that road crosses a canal.

    It’s easy to miss if you’re not looking for it, but that canal is part of water infrastructure that makes life on Colorado’s Front Range possible.

    The state has a geographical mismatch between where water shows up and where much of the population has settled.

    “Wherever you are in this state, you’re either at the source of the drinking water supply, you’re in the middle of the drinking water supply, or you’re at the end of the tap,” said Christina Medved, outreach director at Roaring Fork Conservancy. “So on the Western slope, we are at the source of the water.”

    About 80% of Colorado’s water falls on the western side of the state. Much of it is high-mountain snow and rain that eventually trickles down into streams and rivers like the ones on Independence Pass.

    But about 80% of Colorado’s people live on the east side of the mountains. Because of gravity, that water doesn’t flow to them naturally. Instead, Colorado’s heavily-populated Front Range relies on a massive plumbing system to keep drinking water flowing to its taps.

    Colorado transmountain diversions via the State Engineer’s office

    For a century and a half, engineers have carved up the mountains with tunnels and canals that pipe water across the state through trans-mountain diversions. Some of that infrastructure is nestled near the high-alpine headwaters of the Roaring Fork River, which eventually flows through Aspen and Glenwood Springs on its way to the Colorado River. Near Lost Man reservoir, a dam and tunnel create a juncture between water that will follow that natural path westward to the Colorado, and water that will be diverted eastward through the mountains and onto cities such as Colorado Springs.

    A tunnel through the mountains draws in water that will pass through two reservoirs and the Arkansas River on its way to the southern portion of the Front Range. Water diverted from the Colorado River basin, through trans-mountain diversions, makes up 60 to 70% of the water used by Colorado Springs. Denver, Greeley, Fort Collins and smaller municipalities on the Front Range also rely heavily on Western Slope water.

    Graphic via Holly McClelland/High Country News.

    And these kinds of set ups aren’t confined to Colorado. Similar systems bring water to big cities all across the region. Salt Lake City, Albuquerque and Los Angeles rely on canals and tunnels to ship faraway water into their pipes. New ones are in the works on the Front Range and in southern Utah.

    But these systems aren’t without critics.

    Water from the Roaring Fork River basin heading east out of the end of the Twin Lakes Tunnel (June 2016), which is operated by the Twin Lakes Reservoir and Canal Co., a member of the Front Range Water Council. Photo: Brent Gardner-Smith/Aspen Journalism

    “When you first learn about it, the concept of a trans-mountain diversion is crazy,” said Andy Mueller, general manager of the Colorado River Water Conservation District. “It seems wrong. It seems antithetical to the health of the river. And I have to say all of that’s true.”

    His organization was set up in the 1930s to oppose these diversions and ensure that there is enough water for people on the Western side of the state…

    The issue is, contemporary environmental values aren’t written into the West’s water law. Instead, water use is defined by regulations written when Colorado first became a state in the 1800s. The rules say that if you have rights to use water, it doesn’t matter if you want to use it hundreds of miles away from its source – even if that requires miles of cross-mountain plumbing to do so.

    Colorado Drought Monitor map July 13, 2021.

    At this moment, there is less water to pull from in every part of the state. The Front Range escaped from drought after steady spring rains, but those high-mountain areas that usually provide a dependable source of water for all of Colorado are experiencing a different fate. The western slope is deep in the second year of drought conditions, leaving snowpack and river flows lower than they should be.

    Mueller thinks that only sharpens the need for the Front Range to curtail its water use. Although they retain the legal right to use a certain amount of water, he’s asking them to use less – which he says will promote the health of rivers and their ecosystems west of the divide.

    The ditch that moves water from Lost Man Reservoir to Grizzly Reservoir and then under the Divide to the South Fork of Lake Creek and the Arkansas River.

    On the Front Range, those on the receiving end of diversions say they are listening to their western counterparts when they put up distress signals during particularly critical times. They also say deliberate conservation work is paying off in the longer term. Nathan Elder, water supply manager for Denver Water, said over the past two decades, per capita water use in his district is down by 22%.

    “Everyone in Colorado needs to decrease their use,” he said…

    Amid tension between demands for water on both sides, exacerbated by extreme drought conditions, is the fact that there is not much of an alternative. Colorado’s water system is built to accommodate the fact that the majority of its people and the majority of its water are far from each other. Without fundamental changes to the bedrock of water law, those asking for water will have to work within a system built on trans-mountain diversions…

    Some contingency planning – within the reality of a diversion-centric system – is already in place. In Colorado Springs, which receives some of the flow diverted from the top of Independence Pass, re-use practices are helping the city get more mileage out of the water it’s apportioned.

    Graphic credit: Water Education Colorado

    Abby Ortega, water resources manager for Colorado Springs Utilities, said reused water accounts for 26% of the city’s total portfolio and the city relies heavily on storage to get through dry years like this one.

    Brad Udall: Here’s the latest version of my 4-Panel plot thru Water Year (Oct-Sep) of 2019 of the #coriver big reservoirs, natural flows, precipitation, and temperature. Data goes back or 1906 (or 1935 for reservoirs.) This updates previous work with @GreatLakesPeck

    But climate change threatens to increase the frequency and intensity of droughts, which has water managers on edge and looking more intently at ways to maximize what’s available.

    “Every water planner in the state has some worry with the rapidly declining hydrology on the Colorado river,” Ortega said.

    The #ColoradoRiver is drying up faster than federal officials can keep track. Mandatory water cuts are looming — The #Colorado Sun #COriver #aridification #ActOnClimate #KeepItInTheGround #YampaRiver #GreenRiver

    Lake Mead behind Hoover Dam. Lake Mead last month fell to its lowest level since the Hoover Dam was built in 1936. The shoreline has dropped 45 meters since the reservoir was last full in 2000. Photo by Ken Neubecker via American Rivers

    From The Colorado Sun (Michael Booth):

    Plummeting reservoir levels at Mead and Powell solidify Arizona cutbacks next year and near-future threats to all the Compact states, from Colorado to California

    blunt new report based on June runoff conditions from the Colorado River into Lake Powell and Lake Mead shows the reservoirs fast deteriorating toward “dead pool” status, where stored water is so low it can’t spin the massive hydroelectric power generators buried in the dams, and large swaths of Arizona farmland going fallow.

    The enormous, life-sustaining buckets of water in the drought-stricken West are emptying so fast that the Bureau of Reclamation added a new monthly report – on top of three already scheduled this year – to keep up with the dam

    The bureau said the loss of water is accelerating, confirming projections that massive water restrictions will begin in 2022 for the three Lower Basin states in the seven-state Colorado River Compact. Conservation groups believe Arizona will lose more than 500,000 acre-feet of water usually delivered by the Colorado in 2022 through voluntary and mandatory cuts, forcing significant reductions to irrigated farming in the desert state. Some, but not all, of Arizona’s share will be replaced in trades using water already “banked” in the reservoirs.

    The bureau’s report for June, added on to previously scheduled reservoir updates for January, April and August, paints a dire picture. As snowpack runoff disappeared into dry ground instead of hitting the reservoirs, engineers calculated a 79% chance Lake Powell will fall below its minimum target water height of 3,525 feet above sea level next year.

    That minimum provides only a 35-foot cushion for the minimum water level of 3,490 feet needed to spill water into the electric turbines. The bureau said there is now a 5% chance Lake Powell falls below the minimum needed to generate any power in 2023, and a 17% chance in 2024 — the odds are going up with each new report.

    Lake Mead, which feeds the three Lower Basin compact states of Nevada, California and Arizona, is in even worse shape. The compact requires declaration of restriction-triggering “shortage condition” if Mead hits 1,075 feet or lower. Mead is falling now, and the bureau affirmed the shortage declaration will happen in August. Las Vegas, a short drive from Mead and Hoover Dam, hit 117 degrees on July 10, and longtime local users are alarmed at how fast the pool is evaporating into desert skies.

    Mead is also in great danger of hitting “critical” elevations of 1,025 feet, a sort of emergency-stop minimum, and the minimum pool for generating power at 1,000 feet, the bureau’s new report said. The chances of draining past the minimum by 2025 are now 58%, and the chances of falling below a power pool that year are 21%.

    Weather plus climate change

    Long-term climate change is being exacerbated by a short-term drought lasting more than 20 years in the West, scientist and water engineers say. Even with a future snowpack bonanza – not currently in the forecast – the compact reservoirs will remain in deep trouble, said John Berggren, water policy analyst for the nonprofit Western Resource Advocates.

    The Colorado River basin’s latest snowpack was just about 100% of normal, Berggren noted, but delivered only 50% of normal runoff into the river and the giant reservoirs. Water is soaking into parched ground or evaporating entirely before it can contribute to stream flows.

    “It’s startling how with each new projection, you had thought it can’t possibly get worse,” Berggren said. “Even just a year or two ago, most people would have thought these projections are pretty far away from ever happening.”

    Major water cutbacks for the Lower Basin states are now an unavoidable reality, Berggren said. “This just shows that we no longer have the luxury of thinking it’s a decade down the road.”

    “The June five-year projections for the Colorado River System reaffirm this is a serious situation,” Wayne Pullan, Upper Colorado Basin regional director for the Bureau of Reclamation, said in a statement about the latest river modeling. “We are actively engaged with the Colorado River Basin states and other partners to respond to changing conditions to avoid critical elevations at Lake Powell.”

    The original compact between Upper Basin states – Colorado, New Mexico, Utah and Wyoming – and the Lower Basin was negotiated in 1922. It was given real teeth in 2019 with a Drought Contingency Plan that first penalizes Lower Basin states if levels and inflows into Powell and Mead fall below trigger points.

    hobbs
    Lake Mead December 2017. Photo credit: Greg Hobbs

    Upper Basin states face future cutbacks in water use as well if they can’t deliver agreed-upon amounts of water to the basin separation point at Lee’s Ferry, Arizona, just above the Grand Canyon. Colorado water engineers, agricultural interests and utilities are in ongoing discussions and experiments on how best to leave more in the Colorado should those downstream treaty calls eventually come.

    Mexico is also part of the historic compact. Some states are negotiating with Mexico to build ocean water desalinization plants near the Pacific Ocean, so that Mexico could use that water and the states could keep more river water.

    Stagecoach Reservoir. Photo credit Upper Yampa River Water Conservancy District.

    Colorado tries to refill the Yampa

    Colorado water managers, meanwhile, are working quickly to mitigate some of the intense near-term impacts of recent drought, including along the severely depleted Yampa River in northwest Colorado, which is a tributary of the Colorado River.

    On July 8, the Colorado Water Trust bought 1,000 acre-feet of water in Stagecoach Reservoir, with an option to buy 1,000 more, for releases over the rest of the summer into the Yampa to keep fish alive and keep the river basin healthier in hot temperatures. The Water Trust has made similar purchases in other years, but will likely have to release the water far earlier than usual this season in order to prevent high water temperatures and stagnant flow that stress fish and hurt their spawning chances.

    After spending about $46,000 on the July purchase, the trust has spent just under $500,000 to buy water from Stagecoach’s reserve since 2012. In announcing the deal, the Upper Yampa Water Conservancy District noted the late-May stream flow into Stagecoach was at less than 10 cubic feet per second, when it should have been more than 100 cfs. The district said it has separately released more than 1,500 acre-feet of its own water from Stagecoach so far this year in order to support river health.

    Cash donors to buy the Stagecoach water include the Yampa River Fund, the Yampa Valley Community Foundation and the Tri-State Generation and Transmission Association, among others. Tri-State operates coal-fired electricity generating units down the Yampa to the west of Stagecoach.

    How will the West solve a water crisis if #ClimateChange continues to get worse? — ABC News #ActOnClimate

    From ABC News (Julia Jacobo):

    The West has more hydrologic variability — more flood years and drought years per average year — than any other part of the country, Jay Lund, professor of civil and environmental engineering at the University of California, Davis, and the head of the school’s Center for Watershed Sciences told ABC News.

    But a study published in Science Magazine in 2020 warned that the West is exiting an unusually wet time in its history and heading toward an unusually dry time that could last years — even centuries.

    Some 42% of California’s population is now under a drought emergency — every part of the state except Southern California and the San Francisco Bay Area, California Gov. Gavin Newsom said Thursday. And if some of the most prominent reservoirs in the West are any indication, residents may be in trouble. Last month, water levels in Lake Mead, the largest reservoir in the country, hit historic lows — an alarming notion considering the West is largely dependent on surface water.

    Neighboring Lake Powell, the second-largest reservoir in the U.S., is seeing similar patterns. Lake Mead and Lake Powell will likely never refill to previously normal levels, John Berggren, a water policy analyst with conservation organization Western Resource Advocates, told ABC News.

    “Climate change is definitely challenging the system,” Berggren said. Population growth is straining the system as well, as increasing amounts of water get diverted to more households.

    If the predictions come to fruition, and the recent warm, dry trends persist in coming years, how will the West solve its water crisis?

    For years, states and municipalities are already urging residents, and in some cases enacting laws, to protect the water supply. Some regions on the coast, such as Santa Barbara, California, are installing desalination plants, and other inland areas, such as the state of Arizona, are monitoring ground water supplies as major reservoirs and the Colorado River continue to see the water levels dip.

    The turquoise waters of the Little Colorado River. Photo credit: Lyle Balequah/From the Earth Studio

    Agriculture will be hit the hardest

    Farming uses the largest chunk of water supply, accounting for 80% of consumptive water use in the U.S. and more than 90% in many Western states, according to the U.S. Department of AgricultureYour text to link…, and would likely be the first casualty if supply in the West were strained.

    In Utah, up to 90% of the water used in the state goes to agriculture, The Salt Lake Tribune reported. In Arizona, a large amount of the water extracted from the Colorado River goes toward agriculture, Erinanne Saffell, acting Arizona state climatologist, told ABC News.

    Overall, between 80% and 90% of the water from the Colorado River system is used for agriculture, Berggren said.

    In California, about 80% of the water use goes toward irrigated farming, Lund said, but agriculture only accounts for about 5% of the economy…

    Alternative solutions like desalination and groundwater aren’t always feasible

    As water levels in reservoirs continue to drop, officials are also exploring other options to retrieve water.

    In Arizona, groundwater is the state’s largest water supply, Saffell said. Lawmakers passed legislation in 1980 in which municipalities agreed to not overdraw the groundwater.

    In the past, when there was not enough surface water and water in reservoirs, states would pump as much groundwater as needed, Cora Kammeyer, a senior researcher at the environmental research nonprofit Pacific Institute, told ABC News. But now, after turning to that solution “over and over again,” they are now seeing both surface water and groundwater shortages, she added.

    Depletion of groundwater in the Southwest has been of concern for many years, especially in Arizona. Increased pumping to support population growth near Tucson and Phoenix resulted in water level declines of 300 to 500 feet in the region by the 1980s, according to the U.S. Geological Survey.

    The installation of desalination plants, which remove mineral components from saltwater to create sources for drinking and agriculture, along the coast are for “some extreme cases,” Lund said, and with it comes “a whole host of challenges,” Berggren said.

    The cost of treating seawater is about $2,000 to $3,000 an acre foot, which is about two or three times the cost of the next cheapest source, which is water conservation, such as buying water from farmers and reusing wastewater, Lund said. Relying on desalination plants would likely double a household water bill, he added.

    And while the technology has been around for a while, desalination also presents environmental challenges, such as where to put the salt and sediments left over from the process, which are bad to return to the sea, because all the extra sediment and minerals essentially pollutes the natural seawater. It would also be inefficient to pump the water from the coast to more inland states such as Colorado, Berggren said…

    Water management and conservation may be the strongest solutions

    Water management and conservation have already proven to be the most effective tactics in maintaining water supplies in the West, experts said.

    Arizona water management is well-equipped to ensure supplies to the desert community, Saffell said. The state has been at a Tier Zero level of shortage, the highest classification for a lake shortage, for the past couple of years. It decreases water allotment slightly, but Saffell expects the state to move to an unprecedented Tier One conservation level in 2022, when they will then decrease their draw rom the Colorado River by 8%.

    It will be the first Tier One shortage ordered by the U.S. Bureau of Land Reclamation in lower Colorado River basin states such as Arizona, California, Nevada and some states in northern Mexico. Once Lake Mead, which supplies water to about 25 million people in the region, reaches a certain level, each state will have to extract less water, Berggren said…

    With every drought in the West, officials have made improvements in water management, Lund said.

    And the efforts to conserve have already made great strides in recent decades. in California, cities like Los Angeles and San Francisco are using the same amount of water, or less, as they did 30 years ago, despite substantial increases in population, Heather Cooley, director of research at the Pacific Institute, wrote in 2019.

    Currently, per capita water use is 16% lower than 2013 levels, suggesting there has been some permanent behavior change by Californians since the mid-2010’s drought, California Gov. Gavin Newsom told reporters on Thursday…

    Conservation mandates are imminent

    Officials have already begun to lay down the law on curbing water usage, and additional restrictions are imminent, experts say.

    Newsom requested that residents voluntarily use 15% less water after signing an executive order adding nine counties to the state’s drought emergency on Thursday…

    On Wednesday, Oregon Gov. Kate Brown issued an executive order mandating that state agencies stop watering lawns and washing windows at state offices and facilities and to stop running fountains that don’t recirculate water. The order also bans the planting of new landscape that requires irrigation.

    Low water levels in #LakePowell could affect #NavajoLake — The #PagosaSprings Sun #SanJuanRiver #ColoradoRiver #COriver #aridification

    Graphic credit: Brad Udall via InkStain

    From The Pagosa Springs Sun (Joe Napolitan):

    During a meeting on June 21, members of the San Juan Water Conservation District (SJWCD) board discussed local implications of historically low water levels in Lake Powell.

    “The article that came out today just said that there’s a threshold that Lake Powell has to reach for the CWCB (Colorado Water Conservation Board) to enact some legal movements,” said board member Joe Tedder. “Apparently we’re going to hit that, probably by the end of June.”

    The threshold Tedder referred to is outlined in the Colorado River Drought Contingency Management and Operations Plan (DCP).

    The plan states that if Lake Powell reaches a surface elevation of 3,525 the upper-basin states and the U.S. Bureau of Reclamation (USBR) shall take action to send more water to Lake Powell from reservoirs upstream.

    According to the USBR, the surface elevation of Lake Powell was 3,559 feet on July 4. Aside from the drought in 2005, such low water levels have not been seen since the 1960s, when Lake Powell was still filling after the construction of the Glen Canyon Dam was completed in 1963.

    Low water levels in Lake Powell have implications for the Colorado River Basin, which includes the San Juan River and Pagosa Springs.

    According to a report by the Pacific Institute in 2013, roughly 70 percent of the Colorado River Basin’s water is used to irrigate nearly 5.7 million acres of land for agriculture. The USBR estimates that more than 40 million people depend on the river to support their lives.

    Another report prepared by Southwick Associates in 2012 esti- mated that 5.6 million people over the age of 18 use the Colorado River for recreational purposes each year.

    The same report totals the value of all spending resulting from such recreational expenditures to be $25.6 billion, generating $1.6 billion in federal tax dollars…

    SJWCD board member Doug Secrist outlined provisions in the DCP, stating that in an effort to stabilize Lake Powell, water would be reallocated from reservoirs up- stream, otherwise referred to as initial units…

    “I can tell you that PAWSD is senior to all those reservoirs, so PAWSD water is pretty well protected,” SJWCD Board of Directors President Al Pfister said of the Pagosa Area Wa- ter and Sanitation District. “But it is a very intricate and interwoven issue.”

    […]

    The National Integrated Drought Information System reports that Archuleta County is experiencing its driest year in over a century, and that the initial units from which water is planned to be supplied to Lake Powell are already low in volume and inflow…

    The USBR predicts that the preliminary unregulated flow which supplies the Navajo Reservoir, which presently has a pool elevation 27 feet below the 1981-2010 average, will be 36 percent of the average for the month of July.
    For Blue Mesa, which presently rests 43 feet below the 1981-2010 av- erage, is projected to have an inflow volume 40 percent of average.
    Flaming Gorge, which rests only 3 feet below its average pool eleva- tion, is projected to have an unregu- lated inflow volume of 42 percent of average.

    Bureau of Reclamation Updates #LakePowell’s Status — Lake Powell Life #ColoradoRiver #COriver #aridification

    From Lake Powell Life (Mike Reilley):

    RECLAMATION RELEASES ADDITIONAL 5-YEAR PROJECTIONS TO SUPPORT DROUGHT RESPONSE PLANNING EFFORTS IN THE COLORADO RIVER BASIN

    As one element of the ongoing implementation of the 2019 Drought Contingency Plans for the Colorado River Basin, the Bureau of Reclamation today released additional 5-year projections on the Colorado River System based on June 2021 conditions.

    Five-year projections are typically modeled in January, April and August of each year. The additional June projections will inform the ongoing drought operations planning efforts at key Reclamation reservoirs in the Upper Colorado River Basin. These efforts are ongoing among Reclamation and the Colorado River Basin states under the Upper Basin Drought Response Operations Agreement.

    “The June 5-year projections for the Colorado River System reaffirm this is a serious situation,” said Wayne Pullan, Upper Colorado Basin Regional Director. “We are actively engaged with the Colorado River Basin states and other partners to respond to changing conditions to avoid critical elevations at Lake Powell.”

    Projections for anticipated runoff in the Upper Colorado Basin have declined over the course of the spring. Using information based on recent hydrology (since 1988 and known as the Stress Test Hydrology), Reclamation notes several key findings for Lake Powell in the June 5-year projections:

    A 79% chance that Lake Powell will fall below its target water-surface elevation of 3,525 feet sometime next year.

    Lake Powell’s target water-surface elevation of 3,525 feet provides a 35 vertical-foot buffer designed to minimize the risk of dropping below the minimum power pool elevation of 3,490 feet, and balances the need to protect the infrastructure at Glen Canyon Dam and to meet current operational obligations to the Lower Colorado River Division states of Arizona, California, and Nevada.

    Beyond 2022, Lake Powell’s chances of falling to critical levels also increased.
    There is a 5% chance that Lake Powell will fall below minimum power pool elevation of 3,490 feet in 2023 and 17% in 2024.

    In the Lower Basin, the updated projections for Lake Mead continue to affirm the high likelihood of a first-ever shortage condition in the Lower Basin in calendar year 2022. Consistent with the 2007 Interim Guidelines, if Lake Mead’s end-of-calendar-year elevation is projected to be at or below 1,075 feet, Lake Mead would operate in a shortage condition in the upcoming year. The prescribed shortage reductions for Arizona and Nevada would also be coupled with water savings contributions under the Lower Basin Drought Contingency Plan. Mexico would reduce their allotment and make water savings contributions under Minute 323 to the 1944 U.S. Mexico Water Treaty. Consistent with the 2007 Interim Guidelines, the 2019 DCP and Minute 323, operational decisions for 2022 will be made by Reclamation in August 2021.

    Reclamation is also concerned with the longer-term projections, which show a higher likelihood of Lake Mead declining to the critical elevations of 1,025 and 1,000 feet by 2025. Based on the June update, the chance of this occurring by 2025 is 58% and 21%, respectively.

    Reclamation provides projections using two future hydrology scenarios: The Stress Test Hydrology based on the last 32 years, and the Full Hydrology based on the last 114 years. The Stress Test Hydrology provides more plausible near-term outlooks because it embeds the recent warming trend and current drought period. It is about 11% lower on average compared to the Full Hydrology…

    For more information, the 5-year projections from June 2021 and prior can be viewed by visiting https://www.usbr.gov/lc/region/g4000/riverops/crss-5year-projections.html

    Brad Udall: Second-worst Powell inflows in more than half a century — InkStain

    From InkStain (Brad Udall):

    Brad Udall on twitter yesterday ran through a striking series of graphs of the current state of the Colorado River. With his permission, I’m posting them here along with a slightly polished version of his accompanying commentary. Some key points that grabbed my attention:

  • Second-lowest Powell inflow in a period of record we use dating to 1964.
  • Risk of Powell dropping next year to levels that could jeopardize power production.
  • Risk of Mead dropping low enough in the next 18 months to trigger much deeper “Tier 2” reductions to Lower Basin water users in 2023.
  • Reclamation’s ‘unregulated inflows’ into Lake Powell show that 2021 will be the 2nd worst year after only 2002 going back to 1964. 2021 will be the RED bar most likely. This is a really grim year for runoff.

    Graphic credit: Bureau of Reclamation via Brad Udall

    2021 inflow will be only ~3 maf, compared to the 1981-2010 average of 10.3 maf or the 2000-2021 average of 8.3 maf (20% less than 1981-2010 average).(maf = million acrefeet)

    Considering that Powell will release or lose to evaporation ~ 8.5 maf, the lake will lose ~ 5 maf this year or ~55 feet of elevation.

    April 2021 snowpack above Powell peaked at ~85% of normal but will generate about 25% of normal river flow. This comes on top of April 2020 snowpack of 100% of normal that generated about 50% of normal flow.

    Declining runoff efficiency has been noted in multiple peer-reviewed studies. For a recent overview of recent climate change studies on the Colorado River see this written with Jonathan Overpeck:

    Jeff Lukas points out that the twitter thread implied that the low runoff efficiency this year as measured by runoff as a percent of snowpack is all due directly to warming. I did not mean to imply that. The low runoff percent numbers are much more a function of (1) very low spring precipitation in both 2020 and 2021 and to a lesser extent (2) low soil moisture from the previous year. It may be that there is a human-caused connection to the low spring precipitation although there’s no real evidence of this yet. Low soil moisture in the springs of 2020 and 2021 is definitely connected to dry and very warm late summer and early fall from the previous years. Teasing this apart to obtain the actual driver(s) is not simple. That said, no one should doubt that climate change is reducing the flows of the Colorado. Multiple peer-reviewed papers have now supported this finding.

    More from Jeff on this here.

    Here’s what’s going to happen to the nation’s 2 largest reservoirs because of this measly inflow:

    Losses to Mead and Powell. Graphic credit: Brand Udall via InkStain

    Note that combined contents will drop below 30% by late next year.

    Here’s that decline for all years back to 1935 when Mead first filled. These two reservoirs will hold less water than Mead did alone in many years before 1964 when Powell was built.

    Combined storage, Mead and Powell. Graphic credit: Brad Udall via Inkstain

    By next April Powell will hit 5.4 maf, ~185 feet below full. See Red dots. This will be the lowest since its initial fill in 1964. Since 1999, Powell will have lost ~18 maf, 75% of its contents.

    Graphic credit: Brad Udall via InkStain

    At 5.4 maf Powell could be low enough to lose the ability to generate power. (We’re uncertain about how penstocks operate when lake gets low — water in penstocks can not be aerated or turbine damage will occur.)

    Loss of power, while not calamitous, is concerning. Power revenues fund environmental compliance and other important items in the basin.

    As part of the 2019 agreement, the UB can release flows from reservoirs upstream of Powell to prop it up. But there is only about 5 maf for that all together. It is a one-shot deal.

    We’ll have to wait on next winter to understand what happens after April of 2022. But 5.4 maf is very little water in a 25 maf reservoir.

    So what about Lake Mead, the nation’s largest reservoir?

    Reclamation’s current forecasts show January 1, 2022 elevation at 1065’ feet (8.8 maf) , well below the 1075’ needed to avoid a ‘Tier 1 Shortage’.

    Decline of Lake Mead. Graphic credit: Brad Udall via InkStain

    If it ends up below 1050’ on Jan 1 (as projected in August 2022), that will lead to a Tier 2 Shortage (total cutbacks of 721 kaf). Otherwise, Mead will face a 2nd year of Tier 1 shortages. Either way, this is not good.

    Reclamation releases additional 5-year projections to support #drought response planning efforts in the #ColoradoRiver Basin #COriver #aridification

    Here’s the release from the Bureau of Reclamation:

    As one element of the ongoing implementation of the 2019 Drought Contingency Plans for the Colorado River Basin, the Bureau of Reclamation today released additional 5-year projections on the Colorado River System based on June 2021 conditions.

    Five-year projections are typically modeled in January, April and August of each year. The additional June projections will inform the ongoing drought operations planning efforts at key Reclamation reservoirs in the Upper Colorado River Basin. These efforts are ongoing among Reclamation and the Colorado River Basin states under the Upper Basin Drought Response Operations Agreement.

    “The June 5-year projections for the Colorado River System reaffirm this is a serious situation,” said Wayne Pullan, Upper Colorado Basin Regional Director. “We are actively engaged with the Colorado River Basin states and other partners to respond to changing conditions to avoid critical elevations at Lake Powell.”

    Projections for anticipated runoff in the Upper Colorado Basin have declined over the course of the spring. Using information based on recent hydrology (since 1988 and known as the Stress Test Hydrology), Reclamation notes several key findings for Lake Powell in the June 5-year projections:

    • A 79% chance that Lake Powell will fall below its target water-surface elevation of 3,525 feet sometime next year.
    • Lake Powell’s target water-surface elevation of 3,525 feet provides a 35 vertical-foot buffer designed to minimize the risk of dropping below the minimum power pool elevation of 3,490 feet, and balances the need to protect the infrastructure at Glen Canyon Dam and to meet current operational obligations to the Lower Colorado River Division states of Arizona, California, and Nevada.
    • Beyond 2022, Lake Powell’s chances of falling to critical levels also increased.
    • There is a 5% chance that Lake Powell will fall below minimum power pool elevation of 3,490 feet in 2023 and 17% in 2024.

    In the Lower Basin, the updated projections for Lake Mead continue to affirm the high likelihood of a first-ever shortage condition in the Lower Basin in calendar year 2022. Consistent with the 2007 Interim Guidelines, if Lake Mead’s end-of-calendar-year elevation is projected to be at or below 1,075 feet, Lake Mead would operate in a shortage condition in the upcoming year. The prescribed shortage reductions for Arizona and Nevada would also be coupled with water savings contributions under the Lower Basin Drought Contingency Plan. Mexico would reduce their allotment and make water savings contributions under Minute 323 to the 1944 U.S. Mexico Water Treaty. Consistent with the 2007 Interim Guidelines, the 2019 DCP and Minute 323, operational decisions for 2022 will be made by Reclamation in August 2021.

    Reclamation is also concerned with the longer-term projections, which show a higher likelihood of Lake Mead declining to the critical elevations of 1,025 and 1,000 feet by 2025. Based on the June update, the chance of this occurring by 2025 is 58% and 21%, respectively.

    Reclamation provides projections using two future hydrology scenarios: The Stress Test Hydrology based on the last 32 years, and the Full Hydrology based on the last 114 years. The Stress Test Hydrology provides more plausible near-term outlooks because it embeds the recent warming trend and current drought period. It is about 11% lower on average compared to the Full Hydrology.

    Assumptions about drought operations are included in these projections; drought response operation plans to protect Lake Powell are being developed by Reclamation and the Upper Division states of Colorado, New Mexico, Utah, and Wyoming. Pursuant to the provisions of the Drought Response Operations Agreement and the Companion Agreement, Reclamation will consult with the Lower Division states before finalizing drought response operation plans. If actual hydrology demonstrates an imminent need to protect the elevation at Lake Powell, the Secretary retains all applicable authority to adjust releases from the upstream initial units of the Colorado River Storage Project Act (Flaming Gorge, Navajo, and Blue Mesa reservoirs) before those operating plans can be finalized.

    Reclamation and the Colorado Basin states continue to closely monitor conditions to be prepared to meet the goals of the DROA in the months and years ahead.

    A key component of Reclamation’s Colorado River Basin activities is the integration of sophisticated modeling tools and scientific research to inform water management decisions. Through a decades-long partnership with the Center for Advanced Decision Support for Water and Environmental Systems at the University of Colorado in Boulder, Reclamation hydrologic engineers and hydrologists are actively collaborating with climate, hydrology and decision support scientists to provide advanced modeling tools. Their work is helping Reclamation link advances in science to water resource management decisions in the face of greater uncertainty and increased hydrologic and operational risks.

    Reclamation’s modeling and operations teams further refine these tools, such as the 24-Month studies, to make annual operational determinations for Lake Powell and Lake Mead through close coordination with water and power customers throughout the basin.

    For more information, the 5-year projections from June 2021 and prior can be viewed by visiting https://www.usbr.gov/lc/region/g4000/riverops/crss-5year-projections.html.

    Why the Southwest’s shrinking water reservoirs matter to #Colorado — The #Denver Post #COriver #ColoradoRiver #aridfication #COleg #COWaterPlan

    Lake Powell is seen in a November 2019 aerial photo from the nonprofit EcoFlight. Keeping enough water in the reservoir to support downstream users in Arizona, Nevada and California is complicated by climate change, as well as projections that the upper basin states of Colorado, Utah, Wyoming and New Mexico will use as much as 40% more water than current demand. A recent white paper from a lineup of river experts calls those use projections into question.
    CREDIT: ECOFLIGHT via Aspen Journalism

    From The Denver Post (Bruce Finley):

    Polis signs latest $20 million infusion for Colorado Water Plan as hotter, drier climate grips Southwest

    Colorado Gov. Jared Polis has signed off on increased funding for water development projects that state officials regard as critical to meet growing demands. But the state’s plans to secure more water from rivers here are colliding with the hotter, drier climate that’s hammering the Southwest, where Colorado River reservoirs are at record-low levels.

    Federal authorities warn hydropower electricity for millions of people (and their air conditioners) could be jeopardized if water levels in Lake Powell and Lake Mead — now both about 34% full — fall much lower. That’s partly why water officials from seven states met in Denver this week to size up perils before their next round of negotiations over how states deal with diminishing water.

    Colorado, New Mexico, Utah and Wyoming (the Upper Basin states along the Colorado River) are facing pressure from Lower Basin states (Arizona, Nevada, California) to use less water — even though the 1922 Colorado River Compact legally entitles them to use more — to try to save the downriver reservoirs.

    “There’s a reality that we do have a shrinking water supply and we’re all going to have to figure out new ways to reduce our use. We try to stay out of any state’s business, but we also realize there’s not enough water for the Upper Basin to use its full allotted water under the compact,” said Bill Hasencamp, the Colorado River resources manager for the Metropolitan Water District of Southern California, which serves 19 million people in the Los Angeles area and San Diego…

    Colorado leaders over the past six years have awarded more than $500 million in grants and loans for 323 projects in carrying out the state’s water plan — which calls for $100 million a year through 2050. Polis last week signed the latest monetary infusion into law: HB21-1260 for $20 million more to the Colorado Water Conservation Board to go toward increased water storage capacity and supply. The bill provides $15 million for loans and grants and $5 million for the regional “roundtable” panels that have planned 500 local water development projects.

    Polis also signed off on SB21-189 to spend $1.2 million more in construction funds for the implementation of the overall $20 billion water plan, which was launched in 2015 to ensure enough for a productive economy — from cities to farms to the recreation industry — while preserving healthy rivers through efficient water use and carefully designed water projects. Two in progress would siphon significantly more water out of the Colorado River basin — an expanded reservoir for Denver and enlarged Moffat system that diverts west-flowing water to the northern Front Range…

    “We are already actively talking about and experiencing cuts, which have been particularly painful in this very dry year,” [Rebecca Mitchell] said, referring to the state’s allocation system that forces junior water-rights holders to use less in dry times. “These are historically low conditions and we need basin-wide solutions that we work on together.”

    State officials in Colorado, Utah and Wyoming contend they’re entitled under the 1922 compact to use as much as 2 million acre-feet more water. But those shares are based on century-old calculations for how much water the river can provide — 15 million acre-feet a year — rather than the 12.3 million acre-feet average total flow since 2000.

    Contingency plans for enduring severe droughts are expected to force mandatory cutbacks next year in Arizona, Nevada and Mexico.

    The #YampaRiver is overdrawn and running out of #water. And it’s hardly the only one — The #Colorado Sun #ActOnClimate #aridification

    Yampa River below Oakton Ditch June 14, 2021. Photo credit: Scott Hummer

    From The Colorado Sun (Michael Booth):

    Cross Mountain Ranch, a sprawling cattle, guest and hunting operation near Maybell and the Yampa’s confluence with the Little Snake River, needed water to flood meadows for sheep and other livestock.

    But there was nothing left to divert into the ranch’s ditch at Lily Park. A state official’s snapshot from the time shows no Yampa there at all — just a gravel bar with a stagnant puddle at the base.

    The ranch may be far down river, but it’s high in priority. Under Colorado water law, that means the ranch long ago secured water rights that are vastly senior to many other users on the river. So if the ranch needs it, the state water engineer has to put a “call” on the Yampa and tell junior holders upriver to stop using, letting their water flow on toward Cross Mountain and the Utah border.

    Yampa division engineer Erin Light did just that for the first time ever in 2018. She has an 80-page list of descending water rights holders on the Yampa. The ranch is on page one.

    The easiest way to find enough water to meet the ranch’s rights was to call Craig Generating Station, a massive coal-fired electricity plant holding a variety of river rights and reservoir shares in the Yampa basin. The power station, managed by Tri-State Generation and owned by a variety of Western utilities, has been cooperative on water issues, Light said, and quickly sent more water downstream.

    Then it happened again in 2020. Drought. A nearly dry river by the time the Yampa neared Dinosaur National Monument. And an official state call.

    Yampa River at Stagecoach Res Inlet 10 CFS 5-24-21 May 2021. Photo credit: Scott Hummer

    This year, the Yampa is looking severely troubled again. It’s no longer a fluke, but a trend. And so Light has asked her boss, state engineer Kevin Rein, to approve her 15-page memorandum and request declaring the Yampa officially “over appropriated.”

    Too many users have divided up the river’s dwindling water too many ways, and future ditch diggers and well drillers need to be warned. Dozens of new water rights applications hit the water court for Yampa claims every year, she added…

    Yampa not alone under drought pressure

    The Yampa isn’t the first Colorado river to suffer the indignity of an official declaration of over appropriation. In fact, most of the major rivers were divided too many ways decades ago and therefore need to be managed down to the drop, from the South Platte on the Front Range, to the Arkansas and the Poudre.

    But the fact it’s happening to the Yampa, long running relatively wild and free through the thinly-populated open range of northwest Colorado, is a clear danger sign, according to state officials and conservation groups. Drought in the short term and climate change in the long term are overlaid by relentless economic growth throughout Colorado, turning debates over water use from a distant worry into a current event…

    West Drought Monitor map June 29, 2021.

    Light’s detailed memo justifying the over appropriation declaration for the Yampa noted that water volume delivered by the river has fallen in recent decades from a norm of 1.5 million acre-feet a year to 1.1 million acre-feet. At the U.S. Geological Survey’s Maybell gauge on the Yampa on Friday, the river flowed at about 340 cubic feet per second, less than 16% of the median figure for that day in 105 years of recordkeeping…

    So what would state approval of the over appropriation designation mean in practical terms for northwestern Colorado counties? Developers seeking to drill a new well in the Yampa Basin will see new state scrutiny of their plans to make sure they are not drawing down river water already owned by a senior rights holder. If Light thinks there would be damage, she can require the developer to augment the loss with a different supply, such as stored reservoir water or a pond capturing water during higher runoff periods…

    Anyone with an improperly permitted well will also face new reviews, and dema